Synonyms to sea urchin

marine animal, Loch Ness monster, alevin, benthon, benthos, cetacean, crustacean, dolphin, dugong, fingerling, fish, fry, game fish, grilse, harbor seal, kipper, man-eater, man-eating shark, manatee, minnow, minny, nekton, octopus, panfish, plankton, porpoise, salmon, sea dog, sea lion, sea monster, sea pig, sea serpent, sea snake, seal, shark, shellfish, smolt, sponge, squid, tropical fish, walrus, whale