Sea serpent

A sea serpent is a type of sea monster described in various mythologies and religious texts. Famous sea serpents includes: the Mesopotamian Tiamat, Ugaritic Yam and Tannin, Judaic Leviathan and Rahab, ancient Greek Cetus, Echidna, Hydra and Scylla, Vedic Vritra and Surasa, and the Norse Jörmungandr, etc.