Aspidochelone, a giant turtle or whale that appeared to be an island and lured sailors to their doom Bakunawa Capricorn, Babylonian Water-Goat featured in the Zodiac Cetus, a monster sent by Poseidon to devour Andromeda, only to be destroyed by Perseus Charybdis of Homer, a monster whose mouth formed a whirlpool that sucked any ship nearby beneath the ocean Cirein-cròin Coinchenn, from whose bone the Gae Bulg is made in Celtic mythology The Devil Whale, a demonic whale the size of an island Hydra, Greek multi-headed dragon-like beast Iku-Turso, reputedly a type of colossal octopus or walrus Jörmungandr, the Midgard Serpent and nemesis of Thor in Norse mythology Kraken, a gigantic octopus, squid, or crab-like creature Lacovie Makara Nessie, also known as the Loch Ness Monster Proteus Scylla of Homer, a six-headed, twelve-legged serpentine monster that devoured six men from each ship that passed by Sirens Taniwha The Rainbow Fish Tiamat Timingila Umibōzu Yacumama