[[quoteright:350:[[VideoGame/SonicTheHedgehogCD http://static.tvtropes.org/pmwiki/pub/images/soniccd_tidaltempestboss.jpg]]]]
[[caption-width-right:350:If Sonic can get a bubble shield, Eggman can too.]]

[[DownTheDrain Water]] [[UnderTheSea based]] [[SharkTunnel levels]] in games have an odd reputation. They can be the greatest thing ever, if handled well enough, or the [[ThatOneLevel worst possible]] section(s) of a game. But in these levels, assuming the game itself generally has boss fights at all, the inclusion of water in the arena can radically change a boss battle and how it plays out. Nevertheless, underwater boss battles (or generally water based battles in general) have a LOT of different possible designs, and as can be seen via the examples below, have been a standard change to the traditional BossBattle formula since the beginning of gaming in general.
!!Underwater Boss Battle

The entire arena is underwater, and the boss (as you can probably figure out) is an aquatic creature that cannot survive on land. How good or bad this is depends on how the game handles underwater controls; if the player moves too sluggishly underwater it can make the battle quite a bit tougher than it needs to be. Common types of enemies for this are usually sharks, eels, various forms of octopus, etc.


[[folder: Action Adventure]]
* ''Franchise/TheLegendOfZelda'':
** Morpheel from ''VideoGame/TheLegendOfZeldaTwilightPrincess''.
** Angler Fish, the boss of the fourth dungeon in ''[[VideoGame/TheLegendOfZeldaLinksAwakening Link's Awakening]]'', is an underwater sidescrolling boss.
** Plasmarine, the boss of the seventh dungeon in ''[[VideoGame/TheLegendOfZeldaOracleGames Oracle of Ages]]'', is also fought underwater. The aforementioned Angler Fish also returns to serve as the mid-boss of this level, though for some weird reason even though the background suggests that you're underwater you control Link as if you were on land.
** The second part of the fight against Gyorg, in the 3DS remake of ''[[VideoGame/TheLegendOfZeldaMajorasMask Majora's Mask]]'', plays entirely underwater.
* Every boss in the ''VideoGame/EccoTheDolphin'' series, but seeing as pretty much the entire game takes place underwater, this is hardly surprising.
* ''VideoGame/CastlevaniaPortraitOfRuin'' has Dagon, some kind of weird reptillian... thing. You fight him underwater, and one of his attacks even involves taking away all the water temporarily in order to use it like a weapon.
* ''VideoGame/JawsUnleashed'' for Xbox, surprisingly, the game only had a few bosses that actually were completely underwater. The most notable was the giant squid. [[VideoGame/{{Jaws}} The NES game]] has you fighting the shark underwater, like everything else.
* ''VideoGame/AnUntitledStory'' features [[FanNickname DeepDragon]], a {{stati|onaryBoss}}c, [[KillItWithIce ice-breathing]] sea {{se|gmentedSerpent}}rpent.
* Shark from ''VideoGame/ClashAtDemonhead''. His base is underneath the sea on Route 22, which you'll need an Aqua Lung to reach (and survive).

[[folder: Action Game]]
* ''VideoGame/{{Bomberman}} Hero'' featured some levels with Bomberman turning into a vehicle. One of these was the Bomber Submarine. Essentially crappy shoot-em ups, they featured simple bosses at the end. The bad part: well, the boss rush at the end features an underwater re-encounter with a stone lion [[GiantSpaceFleaFromNowhere for no real reason]]. The weird controls added to a grand total of 5 health units made this battle a living hell.
* ''VideoGame/MonsterHunter Tri'' is the first game in the series to add underwater fighting, and thus underwater boss fights. The final boss [[spoiler: Ceadeus, the cause of the earthquakes]], has no way to get onto land and is a giant, mobile monster on terms with the Jhen Mohran. The fight against it will only be under water, there is no active land to go on to, but there are some set up weapons to use against it. In ''Ultimate'', [[spoiler:Goldbeard Ceadeus is fought the same way]], as well as [[spoiler:Abyssal Lagiacrus, the game's final monster]], fought in the same area. Fortunately, your OxygenMeter is quite generous and can be refilled or extended in many different ways, or [[SuperNotDrowningSkills outright rendered a non-issue]] with the right skill points. \\
Many underwater-capable bosses reappear in ''Monster Hunter Portable 3rd'' and ''Monster Hunter Generations''. Since neither of these games have underwater mechanics, these bosses are fought on land, averting this trope.

[[folder: Beat Em Up]]
* Mech Taco from ''VideoGame/CaptainAmericaAndTheAvengers''. (No, it's not a taco. Think GratuitousJapanese. "Tako" is Japanese for "octopus".)
* In ''VideoGame/Bayonetta2'', the fight against the demon Insidious takes place underwater, as does the second part of Valor's boss fight.

[[folder: First Person Shooter]]
* The Alien Queen in Episode 4 of ''VideoGame/DukeNukem3D''. Not only is she 2000 hit points tougher than the other bosses, you have to fight her underwater, she can give you a nasty zap, ''and'' she keeps laying more enemies!
* The penultimate boss in ''VideoGame/DukeNukemForever'', the Energy Leech. Easily falls under ThatOneBoss thanks to Duke's slow swimming speed.

[[folder: Massively Multiplayer Online Role Playing Game [=MMORPGs=]]]
* Maws, from ''VideoGame/WorldOfWarcraft'', is summoned out in the sea. The raid composition determines whether he's fought at the water's surface or underneath
** Also from ''World of Warcraft'' is The Lurker Below, the second boss of Serpentshrine Cavern. While he's mostly fought on platforms (due to the fact that the water is hot and deals damage over time while you're in it), you're forced to go underwater every so often in order to avoid his Spout attack, which will knock you 100+ yards away into the boiling water, probably causing your death as you try and swim back to the platform.
*** Post buff and pre nerf a dedicated Shadowpriest could keep it's section of a raid alive and underwater the entire fight thanks to Vampiric Embrace shenanigans.
* In ''VideoGame/AdventureQuestWorlds'', you get to battle a Nessie as an underwater boss battle for the third boss fight in Arcangrove.
** Similarly, the Deep Dweller is another underwater boss battle that also serves as a third boss fight in a different area, this one in Etherstorm Wastes.
* ''VideoGame/GuildWars2'' features a significant amount of underwater battles. A fight with a giant escaped shark being one of the earliest.

[[folder: Platform Game]]
* ''Franchise/SuperMarioBros'':
** Kingfin from ''VideoGame/SuperMarioGalaxy''.
** The Octopus boss from ''VideoGame/SuperMarioLand2SixGoldenCoins''.
** A giant Blooper MiniBoss in ''VideoGame/SuperPaperMario''.
** The second battle against Wendy O. Koopa in ''VideoGame/NewSuperMarioBrosWii''. The basic gist is that Kamek has submerged the arena; considering that you can't stomp on enemies underwater, you have to hold out until the water level becomes low enough for you to jump on Wendy. A similar battle occurs in ''VideoGame/NewSuperMarioBros2'', implying this trope to be Wendy's arena of choice.
** In ''VideoGame/NewSuperMarioBrosU'', the first battle against [[OverlordJr Bowser Jr.]] takes place entirely underwater, and the water won't disappear. Fortunately, the boss is a TacticalSuicideBoss, as he launches Targeting Teds that you have to direct into him.
** This trope is ubiquitous in [[GameMod ROM hacks]], thanks to ''VideoGame/KaizoMarioWorld''.
** Eely-Mouth from ''VideoGame/SuperMarioSunshine'', interestingly the only underwater boss in a water-based game.
* ''Franchise/DonkeyKong'':
** Barbos from ''VideoGame/DonkeyKongCountry3DixieKongsDoubleTrouble''.
** Davy Bones from ''VideoGame/DKKingOfSwing''.
** Fugu the Frightening from ''VideoGame/DonkeyKongCountryTropicalFreeze''. Unlike other underwater battles, in this one the Kongs have to keep an eye on the OxygenMeter, and collect bubbles if it's running out.
* The defence wall type minibosses from ''VideoGame/WarioLandShakeIt''.
* The Hulking Lungfish in ''VideoGame/{{Psychonauts}}'' is an underwater enemy whom you fight from within an air bubble. Since [[SuperDrowningSkills Raz can't swim]], you have to figure out how to damage her without leaving the bubble. Eventually, though, she leaves the bubble and starts attacking you as normal.
* ''VideoGame/BanjoTooie'' has an anglerfish of the type 1 variety named Lord Woo Fak Fak. You can actually fight him as the submarine transformation in this level or as bear and bird.
* ''Franchise/MegaMan'':
** Many Robot Masters from the ''VideoGame/MegaManClassic'' games, including the first-ever Robot Mistress, Splash Woman from ''VideoGame/MegaMan9''. Also Bubble Man from ''VideoGame/MegaMan2'' and Dive Man from ''VideoGame/MegaMan4''. Since the main effect of water is super-high jumping, they usually put insta-kill spikes on the ceiling.
** In ''VideoGame/MegaManX'', Launch Octopus and Tidal Whale are fought entirely underwater.
* In ''VideoGame/MrNutz'', the giant octopus boss is fought in an underwater room.
* Doujin game ''VideoGame/{{Rosenkreuzstilette}}'' has you fight Trauare Wrede underwater or above water depending on which path you take in her stage.
* In ''VideoGame/Rayman3HoodlumHavoc'', the boss of The Land of the Livid Dead is a Hoodlum piloting a giant underwater mecha.
* A few examples from the ''Franchise/{{Sonic|TheHedgehog}}'' series include:
** ''[[Videogame/SonicTheHedgehog Sonic 1 (Game Gear/Master System)]]'', unlike the Genesis/Mega-Drive version, had its Labyrinth Zone boss fight completely underwater. [[OneHitKill And there were no rings.]] The game ''was'' kind enough to turn off drowning during that fight.
** ''[[VideoGame/SonicTheHedgehogCD Sonic CD]]'''s Tidal Tempest fight against Eggman's Eggmobile. Eggman is kind of gentle to be surrounded by bubbles Sonic can breathe through...
** ''VideoGame/SonicTheHedgehogTripleTrouble'''s Tidal Plant Zone against Knuckles (!).
** ''VideoGame/SonicBlast'''s fight against Robotnik's submarine in Blue Marine Zone. In order to get more air, Sonic or Knuckles must trick Robotnik into firing a harpoon at the ocean floor so an air bubble will appear from it.
** ''VideoGame/{{Sonic Rush|Series}}'''s Water Palace with Eggman's Egg Turtle is another example where you actually can't drown, though occasionally the water level will drop.
** ''VideoGame/SonicColors'''s fight with Admiral Jelly in Aquarium Park.
* Draygon/Botwoon in ''VideoGame/SuperMetroid'' and Alpha Blogg in ''VideoGame/MetroidPrime2Echoes''. In the former, the Gravity Suit allows Samus to freely move as if she was on the surface.
* ''VideoGame/TyTheTasmanianTiger 3'' has you battle a giant green mutated crab while underwater. Notably, your air meter is also your LifeMeter, and both are replenished by surfacing or swimming into jets of bubbles. Since there are five such jets in the arena, it is literally ''impossible to lose''.
* The hammerhead shark in ''VideoGame/{{Ristar}}''. Hitting it would knock it into a cork which would lower the water level. After knocking out all the corks, all the water is drained and you win, but until that point it just gives you less room to swim around and dodge his attacks.
* ''VideoGame/DrawnToLife'' has an anglerfish boss that is fought entirely underwater.
* ''Franchise/{{Kirby}}'':
** ''VideoGame/KirbysDreamLand3'', Acro the orca starts off as a land-based boss until he destroys the floor and begins the second phase in an underwater arena. He also appears in ''[[VideoGame/Kirby64TheCrystalShards Kirby 64]]'', but this time the whole fight takes place underwater.
** The angler fish Sweet Stuff, from ''VideoGame/KirbysDreamLand2''.
** The fight against Capamari in ''VideoGame/KirbysEpicYarn''.
** In ''VideoGame/KirbyAndTheRainbowCurse'', the battle against Claykken and the rematch with Hooplagoon take place underwater.
* In ''The [[WesternAnimation/TheItchyAndScratchyShow Itchy and Scratchy]] Game'', the boss of the "The Pusseidon Adventure" level is Scratchy in a submarine. To defeat Scratchy, Itchy must open the hatch to the submarine to fill it with water and drown Scratchy.
* In ''VideoGame/{{Wuppo}}'', beneath Popocity's channel, you'll encounter the notorious Breevis - a ridiculously oversized kneft vermin prowling around a large underwater cave. The fight consists of avoiding his attempts to suck you into his mouth, instead filling it with paint from your Gumgumgun and forcing him to spit up segments of his own body.
* ''VideoGame/{{Bug}}'' had [[UnderTheSea Quaria's]] boss, a giant octopus who threw dogfish (fish with dog heads and collars) at Bug who had to swat them back with a tennis racket. While the whole world was underwater, the physics in the level are exactly the same as on dry land.

[[folder: Role Playing Game]]
* King Kuraselache (boss of the First Epoch) and King Rogon (one of the bosses of the Fifth Epoch) in ''VideoGame/EVOSearchForEden'', a great white shark and a [[Film/CreatureFromTheBlackLagoon Gillman]] respectively.
* ''VideoGame/KingdomHearts'' had [[Disney/TheLittleMermaid Ursula]], an underwater battle.
* In ''VideoGame/RomancingSaGa'', one of the EvilMinions of the BigBad ambushes you after getting the CosmicKeystone from the Underwater Temple
* In ''VideoGame/RomancingSaGa2'', you actually fight Subier either underwater or on a boat depending on your actions. [[spoiler: Killing Master of Ocean will always net you his second form and immediately after clearing the shipwreck]]
* ''VideoGame/FinalFantasyVII'' has Emerald WEAPON, an [[BonusBoss optional boss]] who hangs out at the bottom of the sea. And you don't even fight him in your submarine. There's also a couple of underwater (though air-containing) areas.
* All of the boss fights in the Atlantis mission in the first ''VideoGame/MarvelUltimateAlliance'' game, including Tiger Shark, Attuma, and the Kraken.
* The Giant Slaughterfish in ''VideoGame/TheElderScrollsIVOblivion'', which you encounter during the Thieves' Guild questline.
* Geosgaeno and Evrae Altana in ''VideoGame/FinalFantasyX''.

[[folder: Shoot Em Up]]
* ''VideoGame/StarFox64'':
** The giant clam boss in Aquas, the underwater level, while piloting the submarine vehicle exclusive to the level.
** The boss of Zoness is a submarine, though battled at the water's surface while in the Arwing.
* ''VideoGame/UltimateCrabBattle''. The entire games takes place in a boss battle against a GiantEnemyCrab, who has a ridiculously high variety of special attacks mostly based on gadgets he pulls out of himself, hammerspace style.
* ''VideoGame/InTheHunt'' has five of its six boss battles like this. Then again, your character is a submarine, so it's not surprising.

!!Above Water Boss Battle

The player is on a platform or more above the water. Usually, the boss is either in the water and attacks from there, jumps out of the water at the player from under the floor or, in rare occasions, IS the water.


[[folder: Action Adventure]]
* ''Franchise/TheLegendOfZelda'':
** Morpha from ''VideoGame/TheLegendOfZeldaOcarinaOfTime''.
** The Twilight Bloat in Lake Hylia in ''VideoGame/TheLegendOfZeldaTwilightPrincess''
** Phytops from ''VideoGame/TheLegendOfZeldaSpiritTracks''.
* ''VideoGame/{{Overlord}}'' has a large sea serpent that sticks its head out of the water and attacks you while you're on land.
* ''VideoGame/ShadowOfTheColossus'' has 2 water-based colossi battles. One is the terrifying electric eel, and the other is a later fight with a colossus who walks around a lake. The first one is unique in that [[ColossusClimb the boss itself is the only platform in the arena]], and it tends to drag you underwater, too.
* ''VideoGame/CastlevaniaChroniclesOfSorrow'' has an unusual case in the form of Rahab, a large fish of some type. The area where you fight him is a pool, and there are no platforms for your hero to stand upon(he instead floats on the surface of the water), but the boss will frequently leap out of the water to attack in one of three ways. Defeating it nets you the ability to move around underwater.
* Rahab from ''VideoGame/LegacyOfKain: Soul Reaver'' is a straight example. He swims around, Raziel jumps between 8 pillars while Rahab shoots water at him or tries to bite him.

[[folder: Massively Multiplayer Online Role Playing Game [=MMORPGs=]]]
* ''VideoGame/WorldOfWarcraft'':
** Maws is summoned out in the sea. The raid composition determines whether he's fought at the water's surface or underneath
** The Lurker Below in Serpentshrine Cavern, must be fished out of a pool of water (it's a gigantic sea monster sort of thing) to initiate the battle. The raid's preparation determines whether the water around it is filled with flesheating bastardly fish (bad) or boiling (not as bad), so it's generally advised to stay on the solid ring around the boss' pool.

[[folder: Platform Game]]
* Cheepskipper from ''VideoGame/NewSuperMarioBros''
* Kroctopus from ''VideoGame/DonkeyKongCountry3DixieKongsDoubleTrouble''.
* Possibly Catbat from ''VideoGame/WarioLand4''.
* ''Franchise/{{Metroid}}'':
** ''VideoGame/MetroidFusion'' has Serris. It jumps out of the water frequently, its entire attack pattern revolves around snaking in and out of the water while you either try and dodge from one of several platforms or hang on an overhead ladder on the ceiling and try and avoid from there.
** The second B.O.X fight - This time you're on a overhead ladder across the ceiling while it stays in the water, electrifying it, while occasionally jumping at you and shooting missiles.
** Nettori just kind of stands there above the water, but the water has deadly plants growing in there which eat you alive and make it difficult to get out of the water if you fall into it.
** The Chykka larva from ''VideoGame/MetroidPrime2'' swims around in toxic water while you stand on a platform. You can attack it while it's swimming, though it's very hard to hit. He does occasionally jump out of the water and also occasionally jump onto onto the platform partially to try to eat you.
* Fatty Whale from ''VideoGame/KirbySuperStar'' and its [[VideoGameRemake remake]] (''Super Star Ultra'') attacks either by bouncing atop the floating platform Kirby's standing on or by swimming around said platform while attack.
* The grotesquely hideous [[http://www.youtube.com/watch?v=IO72bE_gZKo Jinmen-Gyo (Man-Faced Fish)]] from the 4th stage of ''VideoGame/{{Contra}}: Shattered Soldier''. It attacks by jumping out of the water, trying to eat the player from one of three floating platforms, as well as sucking the platforms into his mouth in a bid to swallow the player alive.
* The ''[[Franchise/SonicTheHedgehog Sonic series]]'' has examples of this type too.
** ''VideoGame/SonicTheHedgehog2'' has two bosses like this, neither of which actually involve water:
*** Hill Top Zone's Flying Eggman Mech jumps up from a lake of lava, spits a fireball, then dives back in post attack. [[ConvectionSchmonvection Hitting it doesn't hurt you, but hitting the lava does]]
*** Oil Ocean's Flying Eggman Mech 2.0 also comes up from below periodically, after spending a while attacking with a spiked claw and a laser gun from under the oil. [[SuperNotDrowningSkills You can actually jump into the oil and as long as you keep jumping, you won't sink to your death.]]
** Chaos 4 in ''Videogame/SonicAdventure''. Because it sometimes takes a while for him to pop out of the swamp, he can on occasion be one of the longest boss fights in the game.
** Planet Wisp's Rotatotron in the DS version of ''VideoGame/SonicColors'' is above water while you are too, but its major weak spots are underwater, only reachable by use of the drill wisp.
* The Stage 2 boss of ''VideoGame/AlisiaDragoon''.

[[folder: Shoot Em Up]]
* ''VideoGame/{{Einhander}}'' has [[MeaningfulName Salamander]], the [[NinjaPirateZombieRobot amphibious stingray submarine with a pair of arms]]. It attacks you from the water during the first half of the fight... after which it gets out of the water to attack you while hanging from two bars above..

[[folder: Stealth Based Game]]
* Vamp in ''VideoGame/MetalGearSolid2'', kind of. He'll swim through the water in the room, but only attack you when above it.

!!Boat Based Water Boss Battle

Your character is riding in a boat or similar vehicle on the surface of the water while the boss attacks from the actual lake/river/whatever type. Also counts any races or events against water based boss characters that involve said boat or vehicle usage on the surface.


[[folder: Action Adventure]]
* Bahamut from ''VideoGame/LaMulana'' is of the boat-based variety, with the annoying caveat that you can fall out of the boat (which causes a lot of damage).
* The boss battle against "Sapientia" has ''VideoGame/{{Bayonetta}}'' [[ShieldSurf surfing on a piece of scrap metal]] in the middle of the ocean while Sapientia tries to attack from underneath her. During the last section of the fight, the battle is fought in a giant whirlpool.
* ''VideoGame/CastleCrashers'' has the river rapids level where you surf on top of logs, rafts or even corpses against a giant [[MixAndMatchCritters Catfish.]]

[[folder: Action Game]]
* In ''VideoGame/{{Jaws}}'' for NES, the [[TrueFinalBoss very definitive final battle]] against the giant shark requires you to [[spoiler: ram the boat's [[http://en.wikipedia.org/wiki/Bowsprit bowsrpit]] into the shark to kill it [[DeaderThanDead once and for all]].]]

[[folder: Massively Multiplayer Online Role Playing Game [=MMORPGs=]]]
* De Rol Le in ''VideoGame/PhantasyStarOnline''.

[[folder: Platform Game]]
* ''VideoGame/DonkeyKong64'' has the player, as Lanky Kong, motor around in a boat while navigating a maze of electrified bouys during the battle with a giant pufferfish.
* ''VideoGame/DiddyKongRacing'' features a boss race against an octopus.
* The second boss of ''[[VideoGame/GhostsNGoblins Super Ghouls 'n Ghosts]]'', the Kraken, is fought from a tiny raft.
* ''VideoGame/{{Bug}}'' has the boss of [[BubblegloopSwamp Splot!]], a swamp worm. Bug rides a platform floating on the water while the boss lunges out of the water or takes potshots at him. Once the boss takes enough damage, the platform sinks, and Bug has to GoombaSpringboard on the boss' body onto an even smaller platform. Notably, it's the toughest boss in the game since getting hit will cause knockback, resulting in Bug falling into the water and [[SuperDrowningSkills drowning instantly]], MercyInvincibility be damned.
* In ''VideoGame/SonicMania'', The mini-boss of Hydrocity Zone Act 1 involves [[BeatThemAtTheirOwnGame Sonic piloting the original Act 2 boss machine]], attempting to suck up Eggman into the propeller blades as Eggman did to him in ''Sonic 3''.

[[folder: Role Playing Game ]]
* ''VideoGame/MegaManLegends'' has [=MegaMan=] fighting against Tron's Frog Bot at Lake Jynn while he's riding in a boat he got from Wily's (no relation to the MadScientist of [[VideoGame/MegaMan the original series]]).

[[folder: Survival Horror]]
* [[SeaMonster Del Lago]] of ''VideoGame/ResidentEvil4'' is fought as it drags the hero around a lake in a small boat. Fortunately, the boat conatins an [[BottomlessMagazines unlimited supply of harpoons]].

[[folder: Third Person Shooter]]
* ''VideoGame/GearsOfWar2'' features the Leviathan, a Kraken/piranha mix that tried to drag your boat down, then eat it whole.

!!Character in Water, Boss Above Water

Your character is in the water, the boss is above the water.


[[folder: Action Adventure]]
* ''VideoGame/CastlevaniaOrderOfEcclesia'' has a boss with waist/ankle deep water. The boss floats on top of the water, and attacks you, sometimes summoning giant tidal waves.

[[folder: Platform Game]]
* ''VideoGame/SonicTheHedgehog''[='s=] Labyrinth Zone boss qualifies, though it is more of [[RiseToTheChallenge a race against rising water]], so if you go fast enough, none of the battle will be spent underwater. [[ThatOneBoss Which is hard to do.]] ''VideoGame/SonicTheHedgehog4'''s Lost Labyrinth level, being based on the original Labyrinth Zone, also does this.
** Both Hydrocity Zone bosses in ''VideoGame/{{Sonic 3|AndKnuckles}}''. For Act 1, the water is deep enough to drown in, and the boss stirs up the water to knock you off your feet. For Act 2, the water is waist-deep, and Robotnik uses it to try and pull you into a whirling propeller.
** ''{{VideoGame/Sonic Advance|Trilogy}}'' later featured a fight in Ice Mountain Zone where most of the arena is filled with water and Robotnik stays around the top of the screen, necessitating a stepping-stone strategy to reach him or simply catch a breath.
* Jet Stingray in ''VideoGame/MegaManX 4''. His battle consists of half the area filled with water, and he normally floats above the water dropping stingray drones that move around the floor, but will also dive down to attack X or Zero.
** ''VideoGame/MegaMan3'' has a MookMaker that drops turtles into the pool Mega Man is in. Destroying the turtles destroys the boss.
** The battle with Mega Water.S in ''Mega Man: The Wily Wars'', though the opening of the battle gives you the impression that it would be a straightforward underwater fight.

[[folder: Shoot Em Up]]
* ''VideoGame/InTheHunt'' has a {{stationary|Boss}} robot boss that hung from the ceiling above the water in its first phase. Thing is, your character is a submarine that can only travel about the water, so you had to surface and use your anti-air weapon to damage the boss.

[[folder: Stealth Based Game]]
* In ''VideoGame/MetalGearSolid3'', it's possible (and easy) to fight The Pain this way.

!!Multiple Cases


[[folder: Action Adventure]]
* In the battle against the Living Core in ''VideoGame/CaveStory'', the water goes up and down.
* Octogon, the boss of the sixth dungeon in ''[[VideoGame/TheLegendOfZeldaOracleGames The Legend of Zelda: Oracle of Ages]]'', moves its weak spot below the surface when hit from the platform and back above the surface when hit underwater.
* It's possible to fight Gyorg of ''[[VideoGame/TheLegendOfZeldaMajorasMask Majora's Mask]]'' entirely underwater in Zora form, though you can also fight it from the platform in the middle of the arena. The 3DS [[VideoGameRemake remake]] adds a second phase in which the platform sinks, forcing you to fight it underwater.

[[folder: MMORPG]]
* Bal Rodas in ''VideoGame/PhantasyStarOnline2'' is typically fought in a water tunnel with the players taking on [[VideoGame/PhantasyStarOnline De Rol Le]]'s SpiritualSuccessor on a boat. It can also be encountered in the Undersea Laboratory field, where it will fight players on land.

[[folder: Platform Game]]
* Demonic from ''VideoGame/{{Purple}}'' is normally a waterless battle, but he can raise water into the room in an attempt to electrify you.
* ''Franchise/SonicTheHedgehog'':
** ''[[VideoGame/SonicRushSeries Sonic Rush Adventure]]'''s Coral Cave boss, the Ghost Kraken, is mostly above water, but sometimes it drags you and the platform down to fight you underwater for a bit. Like the ''Rush'' example above, you can't drown.
** Bizarrely, the first part of ''VideoGame/SonicTheHedgehogTripleTrouble'''s ''first boss'', the Grand Motobug, has you underwater and the turtle boss above water, but you can jump out to hit him.
** In ''VideoGame/SonicMania'', the boss of Hydrocity Zone Act 2 involves you having to avoid obstacles while being blown through a water tunnel while trying to keep yourself from drowning and sending bombs into Eggman. Each bomb that hits Eggman provides an air bubble. Afterwards, you're sent into another area where you must fight his Whirlpool Machine (from ''Sonic the Hedgehog 3'') to complete the level.
* In ''VideoGame/{{Mega Man X}}7'', both the player and Splash Warfly start off above water, but Splash Warfly's modus operandi is diving into the sea and reappearing from random locations to attempt a sneak attack. [[SuperDrowningSkills Trying to follow his example will get you killed.]]
** Bubble Crab from ''X2'' will raise and lower the water level randomly, sometimes making it low enough to be nonexistent.
* In ''VideoGame/Rockman4MinusInfinity'', the battle against Dive Man starts off this way, but he and Mega Man can jump up to the platform above the aquatic arena.


[[folder: Role Playing Game]]
* One of the early boss battles of ''VideoGame/FinalFantasyVI'' is against Ultros while riding a raft. The GBA remake also adds Leviathan as a BonusBoss, who is fought underwater.
* ''VideoGame/MonsterHunter Tri'' has, barring the underwater-only bosses fought in the sunken ruins of Moga Village, aquatic monsters that can be fought underwater as well as on land, such as Royal Ludroth, Gobul, Plesioth (only present in ''Portable 3rd'' as a land monster and in ''Ultimate'' as both), and Lagiacrus.
* Averted in the battle with the Dragon King in ''VideoGame/BookwormAdventures, Volume 2''. The Super Sutra, which was earned in the previous level, allows Lex & his companions to breathe underwater, and thus there's nothing different about the level's dynamics.
* ''VideoGame/{{Chantelise}}'': The ElectricJellyfish fight in the Aquan Ruins is fought at the bottom of a water-filled pool.

[[folder: Wide Open Sandbox]]
* The boss battles with the orca and {{giant squid}} in ''VideoGame/JawsUnleashed''.