Oh let me save everyone the trouble. Its a flame war! Let's all fight over whether we are modern Hebrews, Catholic Demonologists, or famous authors! I'm not Jewish, therefore its a fish! :-D
where were you lot in Calyspso familierisation? The Leviathan is of the taxonomic class Pontos. They have neither gills or blowhole, they gain oxygen by way of a electroysis method from swallowed water, creating the electricity to do so from a static generating muscle action and using a highly efficent catalyst in their lungs, which resemble Earth fuel cells. some of the Hydrogen by-product is absorbed back into their tissue, hence why they ballon out so much.
FAIL WHALE! W W W W W W W '. W .-""-._ \ \.--| / "-..__) .-' | _ / \'-.__, .__.,' `'----'._\--' VVVVVVVVVVVVVVVVVVVVV or also at times found in this state ▄██████████████▄▐█▄▄▄▄█▌ ██████▌▄▌▄▐▐▌███▌▀▀██▀▀ ████▄█▌▄▌▄▐▐▌▀███▄▄█▌ ▄▄▄▄▄██████████████▀ :D
This may also explain why they float a bit above the surface when they die. That's some good science there, aridash! ;-)