1. (n.) A fabulous creature, half horse and half fish, represented in classic mythology as driven by sea dogs or ridden by the Nereids. It is also depicted in heraldry. See Hippocampus.

2. (n.) The walrus.

3. (n.) Any fish of the genus Hippocampus.

Argus Briareus Cerberus Charybdis Cyclops Echidna Gila monster Gorgon Harpy Hydra Loch Ness monster Mafioso Medusa Minotaur Pegasus Python Scylla Sphinx Talos Tartar Typhon Young Turk agama alligator anole bear bearded lizard beast beldam berserk berserker blindworm bomber box turtle brute butterfly agama cayman centaur chameleon chimera cockatrice crank crocodile crosspatch demon devil diamondback drake false map turtle feist fiend fire-eater firebrand flying dragon fury gavial gecko girdle-tailed lizard glass snake goon gorilla green turtle griffin grizzly bear grouch gunsel hardnose hawksbill hawksbill turtle hell-raiser hellcat hellhound hellion hippocampus holy terror hood hoodlum hothead hotspur iguana incendiary killer leatherback lizard mad dog madcap matamata mermaid merman monitor monster mugger nixie ogre ogress rapist revolutionary roc salamander satyr savage sea horse sea serpent sea turtle she-wolf siren soft-shelled turtle sorehead spitfire stump tail teju termagant terrapin terror terrorist tiger tigress tortoise tough tough guy troll tuatara turtle ugly customer unicorn vampire violent virago vixen werewolf wild beast windigo witch wolf xiphopagus zombie