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Sea Stars: Asteroidea

Physical Characteristics, Behavior And Reproduction, Sea Stars And People, Sand Star (astropecten Irregularis): Species AccountsGEOGRAPHIC RANGE, HABITAT, DIET, CONSERVATION STATUS

SAND STAR (Astropecten irregularis): SPECIES ACCOUNTS
CROWN-OF-THORNS (Acanthaster planci): SPECIES ACCOUNTS
BLUE STARFISH (Linckia laevigata): SPECIES ACCOUNTS
NORTHERN PACIFIC SEA STAR (Asterias amurensis): SPECIES ACCOUNTS
VELCRO SEA STAR (Novodinia antillensis): SPECIES ACCOUNTS

Sea stars live in the Pacific, Atlantic, and Indian oceans, including the Antarctic regions.


Sea stars live in the sea from the shore to the deepest ocean. They live in sea grass beds, under rock rubble, on coral reefs and rocky underwater cliffs, and in sand and mud.

Sea stars eat anything that is too slow to escape, such as mollusks, crustaceans, sponges, worms, and even other sea stars and their relatives. Mollusks (MAH-lusks) are animals with a soft, unsegmented body that may or may not have a shell. Crustaceans (krus-TAY-shuns) are water-dwelling animals that have jointed legs and a hard shell but no backbone.


Sea stars are not considered threatened or endangered.

Additional topics

Animal Life ResourceJellyfish, Sponges, and Other Simple Animals