What is Class Asteroidea ?
Sea stars are probably one of the most recognizable of all Echinoderms. Often beautifully colored and symmetrical, they are predators that feed voraciously on bivalve mollusks. One of the most interesting things about sea stars is their feeding method. They can feed by prying open the shells of a bivalve with their arms, and then extrude their stomachs through mouths located on the bottom surface of their bodies, into the mollusk. Digestive enzymes are then secreted, digesting the mollusk.