Beach Starfish Wallpaper          Brisingida Forcipulatida Paxillosida Notomyotida Spinulosida Valvatida Velatida [ 1 ] Starfish or sea stars are echinoderms belonging to the class Asteroidea . [ 2 ] The names "starfish" and "sea star" essentially refer to members of the class Asteroidea. However, common usage frequently finds these