Sea serpents are large, scaly, snake-like creatures which live in the oceans. They have gills, and generally stay below the surface of the water, unless hunting surface-bound prey. They are meat-eaters, and will hunt just about anything they can catch.
Sea serpents vary in size dependent upon age. Hatchlings are generally only 3-5 feet long, yearlings reach up to 18 feet in length, and a 3 year old mature serpent can be up to 35 feet long. Even larger serpents have been reported; though some exaggeration seems likely.
Sea serpents are generally green or blue in coloration, with some black, and a few more brightly colored specimens occurring around coral reefs.