Matching Pairs Match the Sea CreatureOnline version Match the Sea Creature image with the description by Laura Kucinski 1 I improve water quality by filtering nutrients, algae and bacteria. 2 This sea critter’s blood turns blue when exposed to air. And, they swim upside down. 3 This aquatic critter feeds on small crabs, shrimp, snails, mussels, claims and small fish. It has a long life span of about 25 to 60 years. 4 This sea life has a pouch like a kangaroo to carry eggs until their babies hatch. 5 I never stand still. I am always moving. 6 I am rarely spotted by predators due to my secretive nature and good camouflage. 7 This sea creature is an omnivore that inhabits salt marshes, eelgrass beds and oyster reefs along New Jersey’s bay shore. 8 This sea critter lives buried in the sand.