Swimming? No thanks. For this list, well be looking only at sea creatures from ancient myths and folklore, excluding fictional monsters from modern works like Moby Dick and Cthulhu, as well as fresh water creatures like the Loch Ness Monster. Our countdown includes the Kraken, The Aspidochelone, The Leviathan, and more! Do you believe any of these creatures really exist? Let us know in the comments! Watch more great mythology videos here: Top 20 Terrifying Female Creatures From Myths And Legends: