![]() ![]() Sea stars live in the sea from the shore to the deepest ocean. Sea stars live in the Pacific, Atlantic, and Indian oceans, including the Antarctic regions. Even so, they are advanced enough to change on the basis of previous experiences and to stop behaviors, usually feeding behaviors, that continue to be unsuccessful. The upper surface is covered with many small, clear sacs used for exchanging oxygen, that is, for breathing. ![]() The upper and lower body surfaces also are covered with pinchers that range from simple spines to hooks. The skeleton of sea stars consists of small plates that act as a firm but flexible skeleton. Depending on the species, tube feet have suckers that help the sea star stick to hard surfaces or assist in prying open the shells of its prey. The bottom of each arm is covered with rows of tube feet along a groove. Sea stars are 0.4 inch (1 centimeter) to almost 3 feet (91 centimeters) across. Some species of sea stars have as many as thirty arms. Sea stars have spiny skin and at least five arms large enough to hold digestive and reproductive organs. VELCRO SEA STAR ( Novodinia antillensis): SPECIES ACCOUNTS NORTHERN PACIFIC SEA STAR ( Asterias amurensis): SPECIES ACCOUNTS SEA STARS: Asteroidea SAND STAR ( Astropecten irregularis): SPECIES ACCOUNTSĬROWN-OF-THORNS ( Acanthaster planci): SPECIES ACCOUNTSīLUE STARFISH ( Linckia laevigata): SPECIES ACCOUNTS ![]()
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