| Sea Serpent 1. (n.) Any marine snake. See Sea snake. 2. (n.) A large marine animal of unknown nature, often reported to have been seen at sea, but never yet captured. Thesaurus Entries Loch Ness monster, alevin, benthon, benthos, cetacean, dolphin, fingerling, fish, fry, game fish, grilse, kipper, man-eater, man-eating shark, marine animal, minnow, minny, nekton, panfish, plankton, porpoise, salmon, sea monster, sea pig, sea snake, shark, smolt, sponge, tropical fish, whale |