[[quoteright:279:[[TabletopGame/MagiNation http://static.tvtropes.org/pmwiki/pub/images/cawh_oc_vs_7782.jpg]]]]
[[caption-width-right:279:What's kraken?]]

->''On a scale of one to ten, there is no number large enough.''
-->-- FlavorText for Cawh, pictured, ''TabletopGame/MagiNation''

These are the big ones. These are the {{sea monster}}s whose size not only matches ships but dwarfs them. When these are introduced, all you'll see is an overhead shot of a small boat on top of a much larger shadow in the water and "small boat" ranges from fishing ship to aircraft carrier. These beasts aren't just big, they're [[TitleDrop leviathan]].

They'll live in the deepest depths and their appearances are saved for the end of days when the world is to be shattered by their movements. If they're not {{Eldritch Abomination}}s, they're the next best thing. There will be little shyness about their inspirations, they'll be unabashedly named after the Norse legend of Kraken or the biblical Leviathan. The Kraken tends to take the form of a [[CombatTentacles tentacle laced]] [[EverythingsSquishierWithCephalopods giant squid or octopus]], while the Leviathan is more variable, ranging from a colossal whale to a massive sea serpent. However, since OurMonstersAreDifferent, the title of kraken or leviathan may be given to all kinds of terrors of the deep.

The leviathan in the bible is often taken to be a view of a whale and is sometimes translated directly as whale (intriguingly the "big fish" that swallowed Jonah was often interpreted as a whale or leviathan but nowadays people are having a lot of fun with it as a {{Megalodon}}). Indeed, the modern Hebrew word for whale is לויתן, or leviathan. Strangely, the [[http://en.wikipedia.org/wiki/Leviathan actual biblical description of a leviathan]] suggests that it has legs and is able to move on land, and seems to refer to armour plates or scales (in fact, if one ignores the WordOfDante and the fire-breathing, it sounds quite like a crocodile).

Kraken on the other hand are believed to be inspired by giant squid[[note]]although they are usually depicted as octopuses and were originally described as more crab-like than cephalopodic[[/note]], and when most people think of a kraken, they tend to imagine a a squid-like creature that is simply many times bigger than a real one. However, since actual Myth/NauticalFolklore says that the Kraken could be mistaken for an entire [[ThatsNoMoon chain of islands]], one can reasonably infer that it was imagined to be ''much'' bigger than most film depictions.

Interestingly a common theme in sea monster stories is that of two contrasting sea beasts that are each other's mortal enemy and in real life sperm whale, the largest predatory whale and deepest diver, are believed to hunt giant squid.

In video games, Kraken often have CognizantLimbs, with their tentacles being considered separate from the body as enemies.

If you were looking for the book by ChinaMieville, see ''Literature/{{Kraken}}''.


[[folder:Anime & Manga]]
* In ''Anime/DigimonXrosWars'', Taiki unleashes Leviamon upon a Bagura Digimon.
* In ''Franchise/YuGiOh'', the mythological Leviathan of Atlantis seems to be a cross between a dragon and a sea serpent.
** [[MeaningfulName Mako Tsunami]] also has [[MakingASplash several monsters like these]] in his deck.
* In ''Manga/OnePiece'', the Straw Hat Crew discovers a gigantic kraken that feeds on ships that pass. [[FluffyTamer Luffy, of course]], has intentions of making it the TeamPet. [[spoiler:And succeeds.]]

* As you might expect, both the {{Sub-Mariner}} and Comicbook/{{Aquaman}} have tangled with these types of creatures. For obvious reasons, they stand a much better chance than do the land-dwelling, air-breathing humans. And remember Aquaman, the so-called "[[WhatKindOfLamePowerIsHeartAnyway lame]]" hero, can [[HeartIsAnAwesomePower summon and control creatures like these...]]
** Namor can also summon a giant whale called Giganto, using a special horn. In ''[[ComicBook/FantasticFour Fantastick Four]] ComicBook/{{Marvel 1602}}'', Benjamin calls the Giganto counterpart "Leviathan".

* In Fanfic/TheCadanceverse, the ponies searching for the Elements must deal with one of these as they journey through the Everfree.
* The ''WebAnimation/{{RWBY}}'' Fanfic ''Fanfic/VariousVytalVentures'' features a Kraken in its opening chapter, which takes place at the beach. In the story its presented as an aquatic Grimm, no more dangerous than a Nevermore or a Deathstalker.

[[folder:Films -- Animated]]
* According to ''Disney/AtlantisTheLostEmpire'', the Biblical Leviathan is actually a ''giant mechanical lobster'' that guards the entrance to Atlantis and looks nothing like the Biblical Leviathan. The Kraken was actually featured in the first act of the film's sequel.
* Ursula's OneWingedAngel form in ''Disney/TheLittleMermaid''.
* ''WesternAnimation/SinbadLegendOfTheSevenSeas'' features a leviathan which the crew mistake for an island, complete with vegetation. [[spoiler: It isn't actually aggressive, and is actually quite useful, as they can use it to tow the ship where they need to go.]] This leviathan gets points for being one of the comparatively few depictions that actually ''is'' big enough to be reasonably mistaken for an island.

[[folder:Films -- Live-Action]]
* In ''Film/ThePhantomMenace'', the Naboo ocean seems to be filled with monsters each getting bigger and bigger as you go deeper and considering the fact that the planet is meant to be hollow and full of ocean that gets you some pretty big fish. Also the oceans of Kamino. Ah hell, any planet with an ocean in the Galaxy Far Far Away is bound to have sea monsters in it.
* WordOfGod states that the creature from ''Film/{{Cloverfield}}'' is a sea monster and not an alien like some believe (the 'falling object' was a satellite that awoke the creature, not the creature itself). Though said creator seems to have taken on the anger of the co-Gods by saying as such, since the others went with the alien explanation, or at the very least wanted viewers to make up their own truths.
* The Kraken from the ''Franchise/PiratesOfTheCaribbean'' series gets bonus obfuscation points for being called "Davy Jones' Leviathan" once. Maybe they just meant leviathan as in "really big thing". The Pirates visual dictionary actually contains a picture of the entire Kraken rather than just its tentacles, and it seems to combine both monsters. Imagine either a whale with tentacles where its head should be, or a squid with a head long enough to act as a tail. Sort of like an inverted ''Film/{{Sharktopus}}''.
* Most people know of the Kraken thanks to ''ClashOfTheTitans''. Never mind [[SadlyMythtaken what a Scandinavian creature was doing in Ancient Greece.]] Not to mention that it is... you know... nothing resembling a squid that pretends to be an island. According to the director's commentary, they didn't even know about the Kraken's mythological origins and attributed its creation to the poem by Tennyson that [[SmallReferencePools most people these days have never heard of]]. In Creator/RayHarryhausen's book, ''The Art of Ray Harryhausen'', he claims that the writer, at least, ''did'' know enough about the Kraken to know that it wasn't from Greek mythology, but put it in anyway [[RuleOfCool because the name sounded so cool]].
** The thing from Clash was supposed to be Cetus/Ketos, the sea monster that Princess Andromeda was supposed to be sacrificed to, but they changed its name for no clear reason.
* ''Film/DeepRising'' has a gigantic, killer mollusc attacking a cruise ship.
* While called "kaiju" (the term for Franchise/{{Godzilla}} and other strange, gigantic monsters in Japanese film), most of the monsters in ''Film/PacificRim'' are closer to this tropic thematically, often modeled on aquatic animals. The biggest and scariest, for instance, has tentacles and the head of a hammerhead shark.
* In the script for the first attempt at an American ''[[Film/{{Godzilla1994}} Godzilla]]'', the parallels between Godzilla and the biblical description of the Leviathan are [[LampshadeHanging lampshaded heavily]].

* Creator/EvaIbbotson is quite fond of the giant kraken. In ''Literature/WhichWitch'', one witch chooses to summon the kraken as her task in the evilness competition that is to determine who gets to marry the dark wizard Arriman. [[spoiler: It works, sort of. Turns out the mommy was killed by a ship, and the little one, that's only as big as a handbag needs a babysitter.]] In ''Literature/IslandOfTheAunts'', the [[spoiler: big one]] makes an appearance, but there's [[spoiler: a little one, too. The little one likes cookies and is quite adorable.]]
* The mollusc-like, world-ending Cthulhu from Creator/HPLovecraft's CthulhuMythos ''may'' count, as it is imprisoned in the ocean on Earth, but originally came from space...
** Father Dagon and Mother Hydra (the titanic leaders of the [[FishPeople Deep Ones]], at least from the [[ExpandedUniverse expanded]] [[CthulhuMythos mythos]]) also count. Plenty of the other [[http://en.wikipedia.org/wiki/Great_Old_One#Table lesser-known Great Old Ones]] may count as well.
* The sixth ''Literature/ArtemisFowl'' book features a kraken. It's actually a peaceful bivalve creature that lives off of microorganisms and krill filtered out of seawater (just like a blue whale in fact). You still don't want to be on top of it when it sheds its skin, though...
* ''Literature/CodexAlera'' has its own leviathans, something like enormous turtles with no shells. WordOfGod is they're descended from plesiosaurs, and the ''smallest'' ones are forty feet long. The larger ones... well, they're probably the single greatest threat to oceangoing ships. Alerans have to use [[MakingASplash watercrafting]] to get around them, and the Canim maintain elaborate maps of their territories to avoid making them angry by sailing in too close.
* In the ScottWesterfeld ''Literature/{{Leviathan}}'' trilogy, the eponymous beast is actually a airship, that looks sort like the biggest whale you'll ever see. In the next book the Behemoth (who is supposed to be a land creature) actually live in the sea, the picture of it puts it up with Lovecraft's beasties. Also there are the normal British navies' Kraken, which are massive squid/octopus monsters that can pull a weakened ironclad under given time, as depicted [[http://www.keiththompsonart.com/pages/navalbattle.html here]].
* Taylor Anderson's ''Literature/{{Destroyermen}}'' series has UsefulNotes/WorldWarII warships fall into an AlternateUniverse where the Cretaceous extinction event didn't happen. Among the sea creatures in this world is the "mountain fish" (apparently actually a whale), so big it can wreck a steamship -- by '''biting''' it. At one point, it's stated that the locals' massive city-ships known as "Homes" are '''almost''' as big as mountain fish -- and a Home is the size of an ''Essex''-class [[http://en.wikipedia.org/wiki/Essex_class_aircraft_carrier aircraft carrier]].
** For bonus points, the sailors of the [[spoiler:Empire of New Britain]] actually call the beast the Leviathan, likely referring to the Biblical one.
* The final book of the ''Literature/{{Illuminatus}} Trilogy'', ''Leviathan'', has the main characters coming face-to-um...''something'' with the eponymous sea-monster, a titanic single-celled organism that's survived and grown since the Paleozoic Era.
* The Enterprise fish from ''TheWarAgainstTheChtorr'', part of the ecological AlienInvasion. These massive fish roam the oceans eating everything natural or man-made to fuel their constant hunger and enormous growth. ImmuneToBullets thanks to their massive layers of blubber, the only way to destroy them is with a low-yield atomic torpedo. A short story about the Enterprise Fish reveals that their huge size is explained by them being a colony of creatures. When they get too large, the host 'fish' dies and breaks apart into smaller creatures.
* Steve Alten writes a lot of books with these; his novel Meg was about a Megalodon (sixty foot prehistoric shark) that makes it to the surface after surviving down in the Marinara Trench. HilarityEnsues. It suffered from some {{sequelitis}} though. His more recent novel The Loch deals with, of course, [[StockNessMonster the Loch Ness Monster]]. In a twist however, Nessie isn't a peaceful plesiosaur but a giant eel with a taste for tourists.
* The Leviathan makes an appearance during TheEndOfTheWorldAsWeKnowIt in ''Literature/GoodOmens''. Since this particular apocalypse has all the Biblical imagery being filtered through a boy who has recently overdosed on {{Green Aesop}}s, its immediate action is to attack a Japanese whaling ship.
-->''The Kraken stirred. And ten million sushi dinners cried out for vengeance.''
* The giant shark from ''Literature/TheAdventuresOfPinocchio'', which was turned into a giant whale by Disney's ''Disney/{{Pinocchio}}'' (and thus, the 'big fish' from Literature/TheBible's Literature/BookOfJonah that inspired it).
* Invoked with the title character of ''Literature/MobyDick''. Although Starbuck insists that he's actually just a particularly large and aggressive whale that should ''probably'' be left alone, Ahab - and, increasingly, Ishmael - see the whale as some kind of ineffable EldritchAbomination - the personification of fate itself, God, Satan, or a combination of all three. Also, among the many, many epigraphs of the book, are quotations from the Bible in reference to Leviathan and the thing that swallowed Jonah, because Leviathan, Moby-Dick the whale, and ''Moby-Dick'' [[MindScrew the book]] are all utterly impossible to fully comprehend.
* Drowned Wednesday from the ''Literature/KeysToTheKingdom'' series was cursed to turn into a massive, omniphagic whale.
* Father from ''[[Literature/{{Animorphs}} The Ellimist Chronicles]]'', a sponge-like creature big enough to cover an entire planet.
* Creator/JRRTolkien's [[TurtleIsland "Fastitocalon"]] in ''The Adventures of Tom Bombadil''.
* Shimmer, the dragon protagonist from Laurence Yep's ''Literature/DragonSeries'' gets into a fight with a raiding party of krakens.
* Although we haven't seen any big sea monsters on the Literature/{{Discworld}} itself, there are mentions of the Midgard Serpent from Norse Mythology circling other flat worlds in ''Discworld/TheColourOfMagic'' and ''Discworld/EqualRites''.
* In ''Literature/TheVoyageOfTheDawnTreader'', the eponymous ship is attacked by a large sea serpent, which almost manages to crush it in its coils.
* In ''[[Literature/ChroniclesOfTheEmergedWorld Sennar's Mission]]'' a gargantuan sea monster similar to a kraken is met on the way to the Submerged World. Its hunting method consist in wait for ships and then make them slither on his body to the gaping mouth in the middle, using tentacles if necessary. However, the beast is never named.
* One of Creator/LarryNiven's ''Svetz the time traveler'' stories is ''Leviathan!'', in which he is sent back in time to catch a whale, but the first "whale" he latches onto with his tractor beam is just too big to bring back -- as it's the Biblical Leviathan, not a whale at all. After realizing that actual whales would have to exist to feed a predator that massive -- so much of the knowledge of the past is lost in his world that they only have vague descriptions of animals that may once have existed -- he brings one back: [[spoiler: Moby Dick, just after he sank the Pequod.]]
* In the first book of ''Literature/TheImmortals'', during the attack on Pirate's Swoop, Daine tries to convince a pod of whales to attack the Carthaki backed pirate fleet. [[ActualPacifist When they refuse and leave]], Daine sends her awareness far out after them, and wakes the Kraken. [[AffablyEvil He's more than happy]] to destroy any fleet she wants. She knows full well it's [[DealwiththeDevil a deal with a demon]], but she's desperate and agrees to his offer. He's described as an octopus with too many arms that are a mile long each, with a body that's a mile and a half. He's also fast: Daine found him out past the Copper Isles, a four day sail. He made it to Pirate's Swoop in the space of a morning.
* The avanc in ChinaMieville's ''Literature/TheScar'', a vaguely described creature from an extradimensional sea large and powerful enough to pull a waterborne city.
* ''Literature/PrinceRoger'': Large aggressive fish make ocean travel a near-impossibility on the planet Marduk.
* In ''Literature/TheBookOfTheNewSun'', Erebus and Abaia are unseen aquatic antagonists who are said to be the size of mountains. Mankind's continued existence is apparently due to them counting only enslavement, rather than destruction, as a victory.
** Further, Severian reads a FutureImperfect story in which the legend of the ''Minotaur'' is conflated with the ''USS Monitor'', the ironclad battleship supposedly being the armored head and shoulders of an aquatic monster.
* In ''Literature/ASongOfIceAndFire'' the Greyjoy family uses a Kraken as their [[AnimalMotifs house symbol.]] As yet no actual Krakrens have been seen in the series, but rumours are beginning to surface that they are appearing.
* On ''Literature/{{Safehold}}'' Krakens are megalodon-sized beasts that look like sharks with tentacles along the body (they can be extended forward to catch a pray); one character from Earth describes them as "creature that looked as if fish performed [[UnusualEuphemism an unspeakable act]] on octopus". Then there are sea dragons, beasts the size of blue whales (they have the same position in Safehold's ecosystem as blue whales on Earth) and finally [[NamesToRunAwayFromReallyFast doomwhales]] that sink ships by swimming too close and feed on sea dragons. They don't eat humans, though... mainly because humans are too small for them to notice.
* Kraken are part of the novel ''The Blue World'' and short story "The Gift of Gab" by Creator/JackVance. In the latter, they are mostly man-sized squid called "dekapods", but there is something larger that is only glimpsed as a prehensile tentacle.
* In TerryBrooks Wishsong of Shannara, a truly massive Kraken is summoned by the villains to help destroy a Dwarven Fortress Dam to accelerate the spreading of the evil taint.

[[folder:Live-Action TV]]
* One episode of ''Jurassic Fight Club'' featured a battle between a ''Megalodon'' shark (see above) and its more recently-discovered contemporary, the "biting sperm whale".
* Beast Legends did an episode featuring a digitally animated kraken incorporating the nastiest features of the Giant Octopus, Giant Squid and Colossal Squid, scaled up to 200ft long from the tip of its head to outstretch tentacles, which take up half the body length them selves.
* If we go with the view that SpaceIsAnOcean, Moya's species of giant living ships called "Leviathans" count as examples of this trope.
* The Leviathans on ''Series/{{Supernatural}}'' are not giant sea creatures, but rather are perfectly capable of living on land and while they are seldom seen in their true form, there's no sign that this true form is any bigger than the human disguises they use. But there are good mythological reasons for calling them by the name "Leviathan": Their backstory is related to biblical mythology; they are {{Eldritch Abomination}}s that are all about [[ToServeMan having a predatory appetite]]; and when their true form is shown, the view isn't very clear, but it definitely has MoreTeethThanTheOsmondFamily.

[[folder:Mythology and Religion]]
* The "Leviathan" is described in the Literature/BookOfJob (Ch. 41, all of it) in the Old Testament of Literature/TheBible, and referenced elsewhere. Unlike most sea creatures, the Leviathan has an affinity for fire or something reasonably similar. Job 41:8 ("Lay thine hand upon him, remember the battle, do no more.") seems to indicate a reasonably high encounter survival rate, considering that this creature is essentially a seagoing dragon. [[spoiler: The usual naturalistic interpretation is a Nile crocodile, which fits everything but the fire breathing.]]
** Leviathan represents the sin of Envy. "Envy lurks in the hearts of men, as Leviathan lurks beneath calm waters."
** Job also makes reference to something called a Behemoth, which has similarly entered the lexicon as a catch-all term for "crazy-great-big-thing". [[spoiler:It's thought to be a hippo, or maybe an elephant, or perhaps even some dinosaur bones the Israelites found.]]
** Also, the great fish that ate Jonah. In the Midrash there's a legend or myth that states that the giant fish which swallowed Jonah narrowly avoids being eaten by Leviathan.
* In Myth/EgyptianMythology, Apep was a colossal serpent that stalked the ancient Egyptian underworld, hoping to devour the sun god. According to TheOtherWiki one of his nicknames was "World Encircler", making him similar to Jormungandr of Myth/NorseMythology.
* Myth/GreekMythology has several large marine creatures. They were typically sent by the sea-nymphs to ravage land-dwelling kings or queens who offended them, and the royals tried to appease the monsters by sacrificing their beautiful daughters, which the heroes then had to rescue. One particularly worthy of mention being Ketos, the monster who was slain by Perseus. It is very obvious that Ketos was what the Kraken was meant to be in ClashOfTheTitans, but they opted for the creature of the Norse myths instead.
** There's also Scylla and Charybdis from ''Literature/TheOdyssey''. Scylla was a six headed, snake necked creature that sat atop a cliff and snatched sailors from passing ships. The reason they didn't just sail around was because of the creature opposite the cliff, her cousin/aunt, Charbydis. Charybdis was a giant mouth under water. Every time she opened her mouth, a whirlpool formed to suck everything down. The original rock and hard place, or alternatively, "devil and the deep blue sea."
** Another example was the sea serpent Heracles fought when he promised to rescue King Laomedon's daughter Hesione in exchange for a pair of magic horses. Heracles eventually killed the monster by letting it swallow him and then cutting his way out from the inside with his sword, but Laomedon tried to cheat him by refusing to give him Hesione and the promised treasure. Pissing off the HotBlooded Heracles was never a bright idea, and in this case Heracles exacted his vengeance by invading and looting Troy, killing the king and all his sons.
** Another example would be the unspecified sea monster sent by Poseidon to help the Greeks in the Trojan War; too bad for Odysseus he forgot to give Poseidon props for that when it was over.
** The best example to be found in this mythology would probably be the sea-monster gods Phorcys and Keto, children of Gaea and Pontus, the Ocean. The spawn of Phorcys and Keto included Echidna, the alleged "Mother of Monsters," the Gorgons, Scylla, the Graea, the sea nymphs, and everything else scary about the sea that wasn't one of Poseidon's offspring.
* Jormungandr the World Serpent of Myth/NorseMythology is also under the sea, long enough to wrap around the world, some legends say ''twice''.
* Norwegian and Icelandic [[Myth/NauticalFolklore sailor's lore]] of the 13th century knows of a sea-monster called Hafgufa ("sea-steam"), a gigantic creature of unclear shape living in the Greenland Sea. Hafgufa is the biggest creature in the sea, rises and sinks at fixed intervals, and while it stays at the surface, it looks like an island or a rock. This profile suggests Hafgufa is the same creature afterwards better known the Kraken.
** According to the Norwegian ''King's Mirror'' (a "popular science" encyclopedia from c. 1250), Hafgufa is always seen in the same two places, suggesting there are only two of its species and that they are infertile, for otherwise there should be much more of them. Hafgufa feeds by belching, which expels so much food that all nearby fish gather into its mouth, then swallowing all the fish down in one gulp.
** In the Icelandic ''[[Literature/TheSagaOfArrowOdd Saga of Arrow-Odd]]'': Sailing past Greenland in search for his archenemy Ogmund Tussock, Arrow-Odd spots two rocks raising themselves up out from the sea, which puzzles Odd. Piloted by Vignir, the ships pass right between the rocks. When they look back later at the day, the rocks have vanished, which baffles Odd even more. Vignir then explains that the rocks were the jaws of Hafgufa, and that they have sailed right through the open maw of the monster. Vignir knew this was not dangerous because Hafgufa had just surfaced and always stays at the surface for at least one tide, even though Ogmund Tussock had summoned the creature by witchcraft to swallow Odd.
* And then, of course, there's [[TropeNamer the Kraken]]. found in medieval Scandinavian, especially Norwegian Myth/NauticalFolklore (it is not yet found in Myth/NorseMythology). It's generally described as a giant cephalopod that literally drags ships under the sea.

* "Belly of the Whale" by Burning Sensations. The video shows the band and others partying in a set that's loosely modeled on a giant whale's mouth, complete with a water-slide entrance.
* Music/{{Mastodon}}'s second album, ''Leviathan'', particularly the song "Megalodon".
* Alestorm, a [[CrazyAwesome Scottish Pirate Metal band]], has a song called (and glorifying) "The Leviathan" on their album ''Black Sails At Midnight''.
** From the same band, "Death Throes of the Terrorsquid" is the sequel to "Leviathan", about the crew seeking vengeance for their defeat at the hands of the beast, and not only taking it on, but [[DidYouJustPunchOutCthulhu sending it straight to hell]].
* Music/{{Revocation}} has "Leviathan Awaits"; here, the eponymous creature seems to be a borderline EldritchAbomination with thousands of eyes, enormous barbed tentacles, and a gigantic, fanged maw. It also devours the research sub that [[TooDumbToLive decided to go poking around its domain]] with ''insulting'' ease.
* {{Steampunk}} band The Cog is Dead has a song titled ''To the Depths Below'' on their album, ''Steam-Powered Stories''. It describes a large, mechanical beast referred to as a leviathan.
* Music/{{Metallica}}'s "The Thing That Should Not Be" is about a massive EldritchAbomination living below the sea.
** The Lovecraft misquote in the lyrics("not dead which eternal lie / stranger eons death may die") makes it pretty clear this is in fact Cthulhu.
* TechnicalDeathMetal band Fleshgod Apocalypse makes an interesting take in their EP ''Mafia''. They play a cover of a song by AtTheGates, "Blinded By Fear", which is about an unnamed terror that "unleaashes purgatory and burns the face of the earth"; however, in the cover, after the song is over a sound of waves and ocean is heard, implying the terror is a sea creature. The fact that [[http://images.wikia.com/lyricwiki/images/4/47/Fleshgod_Apocalypse_-_Mafia.jpg the cover for the EP features a huge octopus-like creature rising from the sea helps]].

[[folder:Tabletop Games]]
* ''TabletopGame/DuelMasters'' features the [[http://duelmasters.wikia.com/wiki/Category:Leviathan Leviathans]] as one of their Water Civilization races.
* Many blue creatures from ''TabletopGame/MagicTheGathering'', which includes [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=121198 Leviathans]], [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=2525 Krakens]], [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=135250 and other deep sea monsters]]. In the backstory, a demonic leviathan fought Nicol Bolas in what would be the very first Planeswalker duel. Millenia later, Nicol Bolas still savors that victory and visits the site of the battle on occasion to bask in the memories.
** [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=378521 Kiora]] is probably the most pro-kraken/leviathan planeswalker currently active. She's looking for sea monsters powerful enough to throw down with [[EldritchAbomination the Eldrazi]], and given that her ultimate produces kraken tokens large enough to throw down with a Hand of Emrakul and win, it's probably only a matter of time.
* In ''{{Rifts}}'', the biggest SeaMonster is the Lord of the Deep, also referred to as ''both'' Kraken and Leviathan, a massive abomination resting at the bottom of the Marianas Trench with tentacles that can reach for thousands of miles.
* ''TabletopGame/DungeonsAndDragons'':
** The splatbook ''Elder Evils'' has the Leviathan, an immense world-spanning sea monster made out of pure chaos which was a side-effect of the creation of the world. It sleeps at the bottom of the ocean and will eventually fade away into nothingness, provided nobody wakes it up. Unfortunately, since this is [[ApocalypseHow Elder Evils]] we're talking about...
** Kraken and another Leviathan also appear in the various ''Monster Manuals'', the former being a particularly GiantSquid with magical powers, the latter being a really, ''really'' big whale. Supposedly.
** ''TabletopGame/ForgottenRealms'' got Leviathan -- the superpowered whale working as Earthmother's divine minion for sea missions. She did never spawn avatars (until merging with Chauntea), such improved natural beasts were enough to deal with her problems.
** While it never appeared in the original novels, the ''{{Dragonlance}}'' modules based on the Chronicles trilogy give us the King of the Deep. The King of the Deep is a nightmarish sea monster with the body of a huge fish covered in silver hairs, the head of a giant squid, and a pair of long, deadly lobster claws, created when ten (or twelve in the updated third Edition version) of the corrupted priests of Istar offered themselves to the [[BigBad Queen of Darkness]], who turned them into this monster.
* In Chaosium's ''Stormbringer'' supplement ''Demon Magic'', the adventure "Sorcerer's Isle" had a {{Megalodon}} that could sink ships by biting through their hulls and a giant whale-like demon named Lvthn.
* ''TabletopGame/{{Warhammer 40000}}'' has a few, though many are rather obscure to the majority of the fandom:
** The Space Wolf homeworld has a ''massive'' kraken (said to be a [[HordeOfAlienLocusts Tyranid offshoot]]) and sea serpents straight out of Norse myth, appropriate given the Space Wolves' Viking theme, and a sea monster is said to live on the planet Armageddon, where it attacked Ork ships. Given the nature of the setting, it's a safe bet that most world with any oceans have at least one.
** The chronologically second and third of the three major [[HordeOfAlienLocusts Tyranid]] Hive Fleets so far are named Kraken and Leviathan, respectively (the first being named Behemoth, incidentally). Hive Fleet Kraken lived up to its namesake, as it made it debut by extending itself into many "tendrils" across a vast swath of galactic space, allowing it to consume a great many more worlds than Behemoth did with its blunt "single monolithic mass" approach; it even allowed it to evade Behemoth's fate of total destruction by surviving through numerous splinter fleets. As for Leviathan, look closely at [[http://wh40k.lexicanum.com/wiki/File:LeviathanAttack.jpg the image]] with the Hive Fleet's tendrils approaching the galaxy from ''below'' the galactic plane; if Leviathan is the sea monster, then the Galaxy is the ship that it dwarfs with its size. And of course, these three fleets are just ''the vanguard'' of a larger Swarm that's predicted to arrive within a century of Leviathan's own arrival, i.e. within the first tenth of the 42nd millennium... assuming that the Time of Ending hasn't overtaken the Galaxy by then, that is.
* The ''TabletopGame/NewWorldOfDarkness'' has the Leviathan as the Kerberos of the Ocean of Fragments. It dwarfs nearly everything else on this list, and pretty much qualifies for EldritchAbomination status on size alone, even disregarding that it's an unstoppable force of nature that literally the entire human race has nightmares about. To give some idea of the scale, no-one has any idea what it actually looks like or what it is -- it's so massive that the most anyone's ever seen of it is a vast, seemingly-infinite wall of flesh that gives no hints to its form. The best guess anyone has is that it's some sort of impossibly gigantic cephalopod, but that's just because it has tentacles.
** There's also a fan-brew game on RPG.net, ''LeviathanTheTempest'', which is all about playing the FishPeople in human form descended from primordial gods of the ocean. They have the ability to assume ungodly large forms, but don't do it except for dire circumstances as it tends to rend the {{Masquerade}} in two and drives humans into a state of holy terror.
*** And humans would utterly crush any Leviathan who tried it.
* The ''New World of Darkness'' Leviathan above is an {{Expy}} for ''TabletopGame/WraithTheOblivion'''s Kraken, one of the largest and most mysterious of its Whistimmu. Indeed, unlike most Whistimmu, it didn't seem to truly dwell in the ocean-like storm of the Tempest, but to be able to reach into it from its true home somewhere else. As far as its physical description and power level, it's basically a dead ringer for the Leviathan.
* ''{{Exalted}}'' name drops the latter with Leviathan, a Lunar from the First Age who's spent the past few millennia stuck in his spirit shape as an orca, dwelling on his failure to protect his Solar mate, and serving as a god to/tormenting the inhabitants of a sunken city. Appropriately enough, he has a custom shapeshifting Knack that not only makes him gigantic, it allows him to ''serve as his own military force'' in mass combat.
** It also has a kraken, although said kraken is made of magma.
* The ''TabletopGame/{{Warhammer}}'' world has buckets of these, as detailed in the Seas of Blood supplement to the early 90s naval warfare spin-off Man'O'War and the 2011 Pirate-themed spin-off Dreadfleet. ''Warhammer'''s giant sea monsters include the classic giant squid Kraken and the horrific Black Leviathan (a humongous deep-sea angler fish that could swallow small ships whole), as well as the Narwhal-like Behemoth, the giant crab Promethean the Sea Dragon, the giant merman Triton, the Sea Elemental and the giant shark Megalodon. Dreadfleet has its own zombie sea monsters - the Sea Giant, Bone Hydra and Leechwyrm - and even a ship made from the rotting undead carcass of an Orb Leviathan (possibly the same species as Man'O'War's Black Leviathan, maybe not). Finally smaller, but still huge, sea monsters are available from Forge World to use in land-based Warhammer armies in the shape of the Merwyrm and its variants.
* The card/drinking game ''Tabletopgame/{{DrunkQuest}}'' has and ocean based expansion pack called the 90 Proof Seas. The toughest monster is, naturally, a Kraken.
* ''TabletopGames/MonstersAndOtherChildishThings'' introduced the Leviathan in the supplement ''Bigger Bads.'' In this case, it's an EldritchAbomination that takes the human form of businessman Levi A. Than, and plots to institute a new world order where the only surviving humans are its brainwashed slaves. In its true form, it resembles an absolutely ''gargantuan'' combination of parts from virtually every creature that's ever lived in the ocean.

* In Creator/WilliamShakespeare's ''Theatre/AMidsummerNightsDream'', Oberon sends Puck off with orders to complete "before the Leviathan can swim a league".

* ''VideoGame/CityOfHeroes'' features Lusca, one of the biggest [[AttackOfThe50FootWhatever Giant Monster]] class enemies in the form of a colossal octopus that menaces Independence Port, and takes over a dozen players to systematically defeat. Oddly, the Kraken in that game is less aquatic, but [[ThatsNoMoon you don't want to know about the Leviathan]]...
** The thing called Kraken is a giant alien from another dimension. During a mission in [[AncientRome Cimerora]] you must fight off tentacles of the actual Kraken.
** Cap'n Krak'n Jumbo Seafood sign in Independence Port. Complete with octopus holding a spoon and fork and wearing a bib.
* ''VideoGame/EarthBound'' has the Kraken, who in this game is less squid and more sea serpent.
* ''VideoGame/{{Resistance}} 2'' features the Kraken. It's actually kind of puny compared to some of these, but it's enormous and tentacley. It also features a creature called a Leviathan, but that one's more {{Kaiju}} than GiantSwimmer, despite living in the mostly-flooded Chicago.
* The ''Franchise/FinalFantasy'' series has Leviathan as a recurring [[SummonMagic summon]], and Kraken as a [[VideoGame/FinalFantasyI Fiend of Chaos]] who's shown up as a boss fight in a few titles.
** Leviathan functions as a FantasticVoyagePlot WombLevel in ''VideoGame/FinalFantasyII''.
** ''VideoGame/FinalFantasyIII'' has the Nepto sea dragon, who roams the oceans of the FloatingContinent. It functions as a BeefGate preventing you from sailing out of the Bay of Nepto, and its rage can only be appeased by placing the gemstone Eye of Nepto in the Nepto Statue in the [[OverlyLongGag Nepto Temple]]. If the party tries to sail away regardless, the ensuing battle is unwinnable, and the party must run (if they can.)
** In ''VideoGame/FinalFantasyIV'', Leviathan is a feared monster that swallows ships whole. When Cecil and his companions set sail from Fabul, Leviathan does just that, scattering the party and taking Rydia to his kingdom, the Land of Summoned Monsters, where the party can later fight him and his Queen, Asura, to earn the right to summon them.
** ''VideoGame/FinalFantasyV'' has an additional sea monster, the plesiosaur-like Syldra. She is Faris' pet sea dragon, who can carry the pirate ship on her back even when the destruction of the Wind Crystal keeps all other ships from sailing. Unfortunately, the boss monster Karlabos/[[BlindIdiotTranslation Karl Boss]] drags her under, and Syldra is further weakened by saving the party from the sinking Walse Tower. In a [[TearJerker Tear Jerking]] scene, [[spoiler:Faris experiences a HeroicBSOD upon Syldra's death, but the latter's spirit would reappear in the third world and offer her help as a Summoned Beast]].
** The closest the original release of ''VideoGame/FinalFantasyVI'' has is the Esper Bismarck, who resembles a giant whale. The UpdatedRerelease adds Leviathan to the Esper roster, by having the sea serpent preying upon ships sailing between South Figaro and Nikeah. Defeating the creature will reduce it to Magicite, which the player can equip.
** ''VideoGame/FinalFantasyIX'' has Lord Gizamaluke, who functions as an early ThatOneBoss. He is revered as a god/king by the [[ProudWarriorRaceGuy Burmecians]], but the capacity to which is never touched upon in the game.
*** Additionally, there is a boss called Kraken, who is, unsurprisingly, water-themed, and has a knack for [[StandardStatusEffects blinding]] your team with ink.
*** You can also run into [[TheUndead Zombie Whales]], which can shrink their victims with sonic screams or turn them into zombies by spitting toxic dust on them.
** ''VideoGame/FinalFantasyX'' Sin is an unusual example in that it shows it can fly toward the middle of the game, but otherwise fits this trope. It appears in AnsemRetort as "World-killing God-whale," and it's ExactlyWhatItSaysOnTheTin.
** Both Leviathan and Kraken appear as bosses in ''VideoGame/FinalFantasyXIV'' - the latter, ''twice.'' Bismarck from ''Final Fantasy VI'' also appears, but as a ''flying'' whale terrorizing the Sea of Clouds.
* The third chapter in ''VideoGame/TalesOfMonkeyIsland'' is called "Lair of the Leviathan". The chapter starts with Guybrush and his ship being eaten by a giant Manatee, but the title Leviathan turns out to be [[spoiler:an even bigger female Manatee, which the first one has to conquer without being eaten]].
* In ''VideoGame/WorldOfWarcraft'', The Lurker Below, a boss in Serpentshrine Cavern raid whose in game model and is actually called "kraken". Its brethren are called kraken as well.
** In Cataclysm, however, there is the more traditional (i.e. giant squid) kraken Ozumat. And that's not even mentioning Nespirah... who is a giant... underwater... something.
*** Also from the same expansion, the Whale Shark. Nearly ten million hit points, quarter million damage bites and an achievement for killing this beast ''just because you CAN'', in other words, you have to kill him specifically for the {{Bragging Rights Reward}} since he doesn't gives loot of any kind.
*** Mists of Pandaria have a few of their own as well. Three squid with the same model as Ozumat - one involved in a quest chain, another swimming in the waters off the coast of Townlong Steppes, and a third seen beached on the coast of the Thunder King's Island. As well as a giant boss eel (and its children) that drops a {{Bragging Rights Reward}}.
* Liir elders in ''VideoGame/SwordOfTheStars'' can grow bigger than blue whales before gravity kills them. The Suul'ka [[spoiler: Liir who attempted to escape gravity's limits]] [[SpaceWhale in space]] are bigger than Leviathan-class starships and have tentacles that can crush dreadnoughts.
* Kyogre from the ''Franchise/{{Pokemon}}'' series has a relationship with Groudon and Rayquaza that's based on that of the Leviathan, Behemoth, and Ziz in mythology, with the former two being sworn enemies, and the latter of the three keeping peace between them. However, it's too small to be considered a proper leviathan (Though still pretty massive by Pokemon standards).
* ''VideoGame/DragonQuestIX'': at Port Llaffan, you meet Jona, a girl with the ability to call Leviathan... a gift the other townsfolk abuse by making the great whale provide the whole town with fish, completely giving up their own fishing efforts.
* ''VideoGame/AgeOfMythology'' has creatures ''[[InNameOnly called]]'' Leviathan and Jormund, but they're no bigger than most of the other Myth Units, though the Leviathan can serve as a living transport ship, implying a case of UnitsNotToScale. The Kraken is also a present myth unit.
** The Jormund is supposed to be the offspring of the real World Serpent though. The snakey fellow himself couldn't show, what with blocking out the entire screen...
* One of the monster types available in ''VideoGame/CrushCrumbleAndChomp'', particularly The Kraken.
* A humongous Zerg monster from ''VideoGame/{{StarCraft II}}'' is called a Leviathan. It can fly, shoot a wide variety of things (even other zerg air units), and has tentacles. It is also shown to be twenty or thirty times the size of a Terran Battlecruiser in some images. The Zerg appear to use them as interplanetary transports, and Kerrigan uses one in ''Heart of the Swarm'' as her mobile base. Concept art indicates that it was originally going to be a whale-like creature larger than a protoss Mothership that could swarm planets with clouds of some kind of creature. There is also a zerg creature from the novels called a Behemoth, which is a docile manta ray-like creature of similar size (it is hard to tell how big the Leviathan is supposed to be) used for transport.
* You can create both of these in ''VideoGame/{{Scribblenauts}}''. The Kraken is a giant squid-like creature, the Leviathan manifests as a long sea serpent.
* In ''VideoGame/TombRaiderLegend'', Lara fights a creature called "The Leviathan".
* The Kraken appears in ''VideoGame/TearsToTiara2'' as TheBait in Izebel's battle plans.
* The first and second boss in the arcade shooter, ''VideoGame/TheOceanHunter''. Leviathan is a giant shark in this game.
* ''VideoGame/RazingStorm'' has a squid-like HumongousMecha named the Kraken, complete with CombatTentacles.
* ''VideoGame/{{Mousehunt}}'' has the Squeaken Mouse and the Leviathan Mouse, which are pretty much a giant octopus and a sea serpent [[MixAndMatchCritters crossed with mice]].
* ''VideoGame/WonderBoyInMonsterLand'' has a Kraken boss, although not particularly large.
* ''VideoGame/WingCommander: Prophecy'': The Terrans assign ReportingNames to the ships used by the new alien race attacking through the new [[CoolGate wormhole]] in the Kilrah System. These names are [[ThemeNaming pretty much all]] names for aquatic creatures from Earth, given that the alien ships all look like they would be at home under the ocean. The capital ships are named for mythological sea monsters, including the Kraken and Leviathan.
* ''VideoGame/EndlessOcean : Blue World'' has both of these. There, the Leviathan is a large albino sperm whale with a back story lifted from ''Literature/MobyDick''. The Kraken appears in the form of Kraken Jr., a young giant squid.
* In ''VideoGame/KidIcarus: Uprising'', you fight a [[GiantSpaceFleaFromNowhere Giant Space Kraken]] at the end of Chapter 8.
* In the Boreas seabed mission of GuildWars, players have to fight a giant kraken like creature as the final boss. In addition, "Leviathans" are large sea serpent like enemies that the players fight at points in the mission "the deep", as well as being frozen in jade at other locations.
* The aptly-named ''Leviathan'' DownloadableContent for ''VideoGame/MassEffect3'' introduces a race of enormous, tentacled aliens that live in the galaxy's deepest oceans. Their species is billions of years old, and was formerly the apex race in the galaxy. Their true name is never given, but they are called "Leviathans" by other races. [[spoiler:They were the race that created the Catalyst, and their faulty parameters were the reason the Catalyst started the ViciousCycle. The first Reaper Harbinger was created from the Leviathans. The few remaining survivors blame themselves for this programming oversight.]]
** The Reapers, giant robotic space cuttlefish [[spoiler:which, in-universe, are designed to resemble the Leviathans]], are a spacefaring version. While they usually rely upon giant red death rays to scuttle ships and raze the occasional city, one point in the final battle shows a Reaper grabbing a Systems Alliance ship that got too close, and crushing it with its mecha-tentacles.
* In the spaceflight simulation game [[VideoGame/KerbalSpaceProgram Kerbal Space Program]], a persistent physics bug that damaged spaceships or made them uncontrollable was nicknamed "The Deep Space Kraken" by the community. [[AscendedMeme That name has stuck]], and in version 0.17, [[spoiler: when the bug was finally quashed, [[EasterEgg the dead body of a giant squid-like creature]] was put on a faraway moonlet as a memento. Of course, it would resurface in a different form later...]]
* ''VideoGame/TheWitcher2'' and its enormous huge [[http://www.youtube.com/watch?v=CA5UJXZwyWs ''Kayran'']]. How he (it? SHE?!) actually manages to stay underwater undetected of Pontar river is a riddle.
* The final boss of ''VideoGame/MetalSlug 7/XX'' is called the [[http://metalslug.wikia.com/wiki/Kraken Kraken]]. It's a giant mechanical octopus that has six tentacles and is resting on a rock on top of lava. It's big enough that each of its tentacles is an instance of the (itself massive) first boss of the game.
* Native alien aquatic units in ''VideoGame/CivilizationBeyondEarth'' consist of Kraken and Sea Dragons (which are Leviathans with the serial numbers filed off).
* The Leviathan monster classification from ''VideoGame/MonsterHunter'' is NOT this trope. What is this trope is Ceadeus, a massive whale-like Elder Dragon that's large enough to cause earthquakes when it rams its head into the sea floor.
* Both the Kraken and the Leviathan are present in ''VideoGame/SoulSacrifice''.
** The Leviathan was a young prince who fused with his crocodile and carries his kingdom on his back... which is also named Leviathan.
** The Kraken was a naval captain whose ship got stolen by pirates. When he found his ship to be beyond repair, he snapped. Hard.
* VideoGame/{{Subnautica}} has three creatures described as “Leviathans,” the Reaper Leviathan, and the unimplemented Sea Emperor [[note]] also known as the Emperor Leviathan [[/note]] and Sea Dragon Leviathan. A “kraken” type creature is a frequent suggestion on forums and the game's subreddit.

* ''Webcomic/MSPaintAdventures'' has Gl'bgolyb, a tentacled sea creature large enough that a whale isn't a good mouthful for her. She's definitely connected with the end of the world, since Gl'bgolyb is capable of uttering the Vast Glub, which would kill all trolls everywhere in the universe except for the very highest caste, of which there are at most only ever two at a time. And she's implied to be small compared to the Horrorterrors, but they live in the Outer Ring (basically, outside the universe, or maybe the space between universes).
* In ''Webcomic/TheDreamlandChronicles'', the heroes venture to the cave of the kraken. (Which bears a strong resemblance to the ''ClashOfTheTitans'' version.)
* ''Webcomic/WapsiSquare'' features a creature bearing some resemblance to the kraken. It is ancient and large enough to [[http://wapsisquare.com/comic/little-too-long/ drop a U-boat on a beach.]] At one point in the past, Bud made a [[CoolPet pet]] out of it and named it Stinky.
* In ''Webcomic/ScaryGoRound'', the Kraken is caught by Ernest Cromerty, Gibbous Moon and Desmond [[FishPeople Fishman]] (who [[RedHerring was previously suspected by some readers to be himself the Kraken]], because he was designated with this term in a prophecy).
* In ''Webcomic/CucumberQuest'', [[http://cucumber.gigidigi.com/archive/page-123/ why, they are told, they can't go by sea.]]
* In ''{{Webcomic/Roommates}}'' the Goblin Regent summoned the Leviathan as [[http://asherhyder.deviantart.com/art/Roommates-Kings-War-74-452198502 giant sea snake/dragon thing]] when he finally hit the GodzillaThreshold.
* In ''{{Webcomic/GuildedAge}}'', a kraken is drawn to Gastonia's port to destroy it as much as possible. Fortunately, it's a NonMaliciousMonster just looking for a mate, so it's easy enough to lure back out to sea.
* The [[http://arc.batoto.net/comics/t/tower-of-god/3/the-company/English/read4d5f68e190e97/tower_of_god_ch3_2.jpg White Steel Eel]] from ''Webcomic/TowerOfGod''.

[[folder:Web Originals]]
* [[Wiki/SCPFoundation SCP-]][[http://scp-wiki.wikidot.com/scp-169 169]]. It's probably bigger than Europe.
** The Wiki/SCPFoundation has plans of varying effectiveness to contain and/or prevent everything from multiple zombie apocalypses to holes in reality that periodically spew monsters. Their plan for this? When you cut through the formal scientific sounding terminology, it amounts to "Hope to hell it doesn't wake up, and if it does, hope it's friendly. The thing is just too damn big to do anything about."
* "[[http://hesir.deviantart.com/art/T-Wurser-Fings-Ave-Appened-168572147 Wurser Fings 'ave 'appened @t Sea]]", [[TalkLikeAPirate matey]]. Jus' not dat much of 'em.
* ''Magical Trevor 4'' featured a Kraken with the face of a haddock.
* [[http://www.cracked.com/article_16871_6-insane-discoveries-that-science-cant-explain_p2.html?wa_user1=5&wa_user2=History&wa_user3=article&wa_user4=recommended This]] Cracked.com article discusses various unsolved mysterious and possible explanations for them. One of the mysterious is the Bloop (an extremely loud sound from underwater), and the possible explanation is that it's Cthulhu.
* Three members of Theatre/TheLeagueOfSTEAM recount their encounters with a Kraken in "Tall Tails."

[[folder:Western Animation]]
* In an episode of ''WesternAnimation/MartinMystery'', a Leviathan was guarding a treasure and attacked anyone who tried to steal it.
* On ''WesternAnimation/{{Catscratch}}'', Gordon goes hunting for the Kraken, who will supposedly grant a wish to whomever would defeat it in battle. In a later episode, the Kraken is revealed to be from another dimension.
* In ''[[WesternAnimation/{{Ben10}} Ben 10]]'', a semi-aquatic Kraken is a MonsterOfTheWeek that terrorizes the coast [[MonsterIsAMommy because someone stole its eggs]]. Interestingly, it's never explained if it is in fact an alien or just an unknown terrestrial species.
* In the ''WesternAnimation/RockosModernLife'' episode "Fish N' Chumps," after a failed attempt at using a live worm as bait for fishing, Rocko decides to use cheese cubes. As soon as he opens the jar, a giant white squid monster rises up asking for the cheese. Rocko hands him the jar. Later in the episode, the squid appears again, asking for more cheese, which Rocko agrees to give him in exchange for getting him and his buddies back home.

[[folder:Real Life]]
* Whales, [[CaptainObvious obviously]].
** There's a fossil whale species named ''[[http://en.wikipedia.org/wiki/Livyatan_melvillei Livyatan melvillei]] (from the Hebrew spelling of Leviathan and the author of Moby Dick). And it is pretty [[http://static.guim.co.uk/sys-images/Guardian/Pix/pictures/2010/6/30/1277901299026/Artists-impression-of-gia-002.jpg scary-looking]].
* For a while researchers theorized that the stories of the Kraken were exaggerations of [[http://en.wikipedia.org/wiki/Giant_squid Giant Squid]] sightings, but more recent discoveries might prove that the tales [[TruthInTelevision were not so exaggerated]]; specimens as large as eight meters (26 feet) have been caught, and it's theorized they can grow to 10 to 13 meters in total. They've also been shown to display aggressive hunting behaviors, in contrast to the hypothesis that they are slothful drifters.
** Then there's the [[http://squid.tepapa.govt.nz/ Colossal Squid]]. [[http://upload.wikimedia.org/wikipedia/en/6/61/Colossal_squid_caught_in_February_2007.jpg A live specimen was caught in 2007]], and initial estimates put its total length at 10 meters (33 feet) long before the tentacles shrank post-mortem. It's theorized that there may be even larger examples of the species in the wild, as the beak of the live specimen was smaller than what they'd found in the stomachs of sperm whales.
* There have always been unpleasantly large cephalopods throughout the history of the world:
** One was ''Cameroceras'', an Ordovician (about 440 million years ago) genus of primitive shelled cephalopods which had long, conical shells ranging from three to 11 feet in length. It does look slightly silly, however, a bit like someone just stuck a cuttlefish in the end of a very long horn.
** An ammonite from the Cretaceous of Germany was ''Parapuzosia'', it had a coiled shell with a six foot diameter. It had numerous cousins in the US that were slightly smaller, about three to five feet in diameter. Basically, take a Nautilus and enlarge it until it's as tall as you are (or more), and there you have it.
** From the Niobraran Sea, of Cretaceous Kansas, we have ''Tusoteuthis'', a 20 to 35 foot long (with tentacles outstretched) relative of the modern-day vampire squid. Of course, it was not even close to being the worst of the worst of the denizens of the Niobraran: a fossil of a predatory salmon, ''Cimolichthys'', showed that the beast choked to death while trying to swallow a ''Tusoteuthis'', tailfirst.
* Much is made about how the bus-sized, 20-foot placoderm fish ''Dunkleosteus'' was the world's first vertebrate superpredator. It's often mentioned that ''Dunkleosteus'' ' bite was among the strongest of any vertebrate living or extinct, and that it was a [[BigEater voracious cannibal]]. What isn't mentioned is how Big D had several, equally voracious relatives, including the evocatively named ''Dinichthys'' and ''Gorgonichthys'', who were only slightly smaller (by about a few feet, or so). And then there was the 30 foot long ''Titanichthys'', the largest placoderm ever, though, it was a [[GentleGiant basking shark-like plankton eater]] with "ineffectual mouthplates."
* Then there's the ''Liopleurodon''. It stalked the seas of the mid to late Jurassic. Its maximum size is controversial, but modern estimates are in the 20-30 foot range, about the size of a killer whale. Some other estimates, though, put it at over 50 feet long, which would make it the largest known ''predator'' in Earth's history.
* Also, the Mosasaurs of the Cretaceous. [[https://en.wikipedia.org/wiki/Tylosaurus Tylosaurus]] could be nearly fifty feet long, and was the top predator of its time. Given that they were closely related to monitor lizards, and may have given rise to snakes, these are the closest things to mythical sea serpents that we're likely to find.
* The bizarre and spectacular [[http://en.wikipedia.org/wiki/File:Haeckel_Siphonophorae_37.jpg Deep-Sea Siphonophore]]s definitely deserve a mention - while the Siphonophores you're familiar with are probably the ever-dreaded Portuguese Man o' War, and the By-the-wind-sailor, deep in the ocean lurk some SCARY BIG guys. Being cnidarians, all of them have poisonous stings, some even being dangerous to humans. Fortunately the chance of coming across one is ludicrous, as they are both rare and strictly deep-sea dwellers.
** The deep-sea siphonophore ''[[http://www.lifesci.ucsb.edu/~biolum/organism/pictures/praya.html Praya dubia]]'' is one of the better known. ''Praya'' colonies form long strings of individuals, some colonies have been recorded at 50 meters long - and that's only the ones they've found. The colonies average out at around a length of 40 meters, though there have been unconfirmed sightings of far longer colonies.
** [[http://www.youtube.com/watch?v=-dhbBfZGfLQ This one]] Appears to be related to the ''Praya dubia'' and features a beautiful red glow. The size on this one appears unclear - some shrimplike creatures dart past the camera but they seem to be much closer to the camera.
** [[http://www.youtube.com/watch?v=KT1TSbarW1U This monster of a Siphonophore looks like something straight out of a cosmic horror story]] and has the dimensions to match - though not stated in the video this unidentified specimen was later found to be 130 meters long. Stop and think about how big that is. The only reason Siphonophores aren't officially considered the largest living animal is because they're actually made up of tens of to thousands of smaller organisms.