Mollusca
Shelled gastropods found both on land and in the sea, coming in varieties such as cone, tower, and moon
What are snails?
Predatory fishes characterized by cartilaginous skeletons, a streamlined shape, and many, many rows of teeth
What are sharks?
Radially-symmetric marine invertebrates known for their ability to regenerate lost limbs
What are sea stars, brittle stars, or basket stars?
Ten-limbed crustaceans with large claws, a carapace of chitin and calcium carbonate and long, muscular tails
What are lobsters?
Gelatinous swimming invertebrates possessing stinging tentacles, no central nervous system, and a complex multi-stage life cycle
What are sea jellies?
Eight-armed, two-tentacled predatory cephalopods that swim with high-speed jet propulsion
What are squids?
Flightless, aquatic predators highly adapted for high-speed agile swimming, notable for their countershading
What are penguins?
Spiny, spherical marine invertebrates known for their lantern-like five-pointed mouths
What are sea urchins?
Teeny-tiny floating crustaceans that are an important food source for baleen whales
What are krill?
Tentacled cnidarians named for a flower that make a great home for many species of fish
What are sea anemones?
Laterally compressed aquatic mollusks that live in a hinged shell
What are bivalves? (Clams, mussels, oysters, scallops, etc. acceptable)
Vulnerable marine reptiles whose hatchlings often have to make a perilous trek from the beach to the sea
What are sea turtles?
Flat, burrowing echinoderms known for their coin-like tests, which are often found washed up on the beach
What are sand dollars?
Sessile, filter-feeding crustaceans, often found stuck to whales, rocks, and ships
What are barnacles?
Slow-growing, colorful, reef-forming cnidarians that form a partnership with symbiotic algae called zooxanthellae
What are stony corals?
Colorful, often poisonous gastropods, whose flamboyant and striking appearance often lends them nicknames such as 'clowns' or 'dragons'
What are nudibranchs (sea slugs)?
Specialized arctic predators famed for a single elongated canine tooth in males
What are narwhals?
Soft, squishy invertebrates who scavenge for food in benthic marine sediments, some of whom can literally spill their guts as a defense mechanism
What are sea cucumbers?
Ancient marine arthropods, that despite their name are more closely related to arachnids than to crustaceans
What are horseshoe crabs?
Gelatinous, painful, and often deadly cnidarians, named for the cube-like shape of their bells
What are box jellies?
Ancient, shelled cephalopods that emerged in the late Cambrian, with only one extant family
What are nautiloids?
Large, slow-going, herbivores whose closest living relatives are the elephants
What are sirenians (manatees and dugongs?)
Ancient echinoderms that attach themselves to their substrate with a stalk and use feathery feeding arms to eat
What are crinoids (sea lilies)?
Crustaceans that vary dramatically in size and habitat, found both as deep-sea giants and in your backyard
What are isopods?
Communal superorganisms, some made of hundreds of small individuals, each specialized for different jobs
What are siphonophores?