Sea monster is a term used to describe a legendary creature that lives in the sea. The four crossword solutions for this term are Scylla (6 letters), Orc (3 letters), LEVIATHAN (9 letters), and Kraken (6 letters). Scylla is a sea monster from Greek mythology with six heads and twelve feet. Orc is a sea monster from English folklore, described as a giant, green-skinned humanoid. LEVIATHAN is a sea monster from the Bible, described as a giant sea serpent or dragon. Finally, Kraken is a legendary sea monster from Scandinavian folklore, described as a giant squid-like creature.