History Main / FiendishFish

See also SwordfishSabre, which can be wielded by fish or man, and SeaMonster. Compare FeatheredFiend ("general" evil bird trope), NeverSmileAtACrocodile, DeviousDolphins, MonstrousSeal, MonsterWhale, WilyWalrus, GiantEnemyCrab and TentacledTerror for scary non-fish aquatic animals.

* ''Fanfic/TheFlightOfTheAlicorn'': The waters of the Impassable Lands teem with "jagugars", carnivorous fish three times a pony's length that will devour anything that falls into the water with them.

* In ''ComicBook/{{Supergirl}}'' story ''ComicBook/TheDeathOfLuthor'', Jerro tells Kara the story of a sea monster which attacked Atlantis long ago. Said monster looked like a ''Megalodon''-sized cross between a catfish, an anglerfish and a dolphinfish.

* Amongst the animals rescued for the titular park in ''Fanfic/PrehistoricEarth'' are the carnivorous prehistoric fish ''Hyneria'' and ''Dunkleosteus'', all of which prove to be understandably dangerous creatures for the rescue team to deal with in their efforts at getting them brought to the park.

** Believe it or not, the fossil Pokemon Dracovish and Arctovish. They are [[MixAndMatchCritter chimeras]] with a cartoon Dunkleosteus head on a stegosaur and plesiosaur body respectively, and their powerful signature move Fishious Rend, which doubles in power if they go second or if the opponent switches, reflects the real-life Dunkleosteus's notorious bite force. Dracovish even gets the Strong Jaw ability to make its Fishious Rend even more powerful, to the point of competitive notoriety.

* AlluringAnglerfish

* ''Franchise/SuperMarioBros'': Cheep Cheeps are the basic underwater enemies throughout the franchise, looking like round red fishes with feathered pectoral fins and a yellow mowhawk-like dorsal fins.. They have many, ''many'' subspecies and some individuals acted as bosses in the series, like Cheepskipper in ''VideoGame/NewSuperMarioBros1'' and the Big Cheep Cheep in ''VideoGame/PaperMarioStickerStar''.

* ''Franchise/SuperMarioBros'': Cheep Cheeps are the basic underwater enemies throughout the franchise, looking like round red fishes with feathered pectoral fins and a yellow mowhawk-like dorsal fins.. They have many, ''many'' subspecies and some individuals acted as bosses in the series, like Cheepskipper in ''VideoGame/NewSuperMarioBros'' and the Big Cheep Cheep in ''VideoGame/PaperMarioStickerStar''.

** ''Super Smash Bros. Brawl'' has the Feyesh, an enemy in ''The Subspace Emissary'' mode that is a goldfish with a giant, single eye for a head and electric tentacles.

** Gyarados is a ferocious, long-bodied fish so powerful that it can level cities, and is renowned for its extremely bad temper. ''Gold/Silver/Crystal'' features a Red Gyarados (most are blue) rampaging in the aptly-named Lake of Rage. In the game a red Gyarardos evolves from a golden Magikarp.

* ''Fanfic/PrehistoricParkReimagined'': Many of the larger carnivorous prehistoric fish encountered prove understandably dangerous animals over the course of the rescue team's (thankfully successful) efforts at rescuing them for the titular zoo. In particular, [[TheLeader Drew]] is very nearly killed (or at least [[AnArmAndALeg maimed]]) by a four member school of dunkleosteus, [[TheSmartGuy Leon]] very narrowly avoids getting his arm bitten off by an onychodus, and [[TheChick Alice]] is forced to very hurriedly flee from an incoming hungry eusthenodon that proceeds to very briefly try to continue chasing her, Drew, and [[TheBigGuy Adrian]] on land before having to return to the water. And while the [[PiranhaProblem megapiranha]], [[PikePeril prehistoric lepisosteus]], and several smaller prehistoric sharks prove not quite as immediately dangerous on their initial encounters, they are nonetheless creatures that are treated carefully by the rescue team and park staff.

** Chi-Yu is a Legendary Pokémon that takes the form of a goldfish made out of lava with jade beads surrounding its eyes. Don't let its adorable appearance fool you as it is in fact an ancient evil born out of raw envy that melts everything it can come across into lava. It is also an incredibly strong Pokémon with a monstrous Special Attack further boosted by its ability that reduces the Special Defense of all the surrounding Pokémon.