The class Stelleroidea or Asteroidea are the starfish, with about 1500 species. They have star-shaped bodies with 5 or more arms attached to a central disc with no obvious joint. They travel with their many tube feet. Most are scavengers or opportunistic predators and some can prise open the tightly closed shells of a clam and digest the contents.
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Photographs and information on the sea stars and starfishes from the Animal Diversity Web.
Taxonomy and photographs of this brittlestar.
Taxonomy and photograph of this brittlestar.
Research project by Michael Richardson on this species, including its classification, habitat, adaptations, nutrition, reproduction and interactions with other species.
Introduction, characteristics, phylogenetic relationships and fossil record of the sea stars and starfishes, from the Tree of Life Web Project.
Photographic study by Jaclin Pisano of Protoreaster nodosus with some fine images.
Article on the development of a starfish by Jan Parmentier with many fascinating photographs.
Encyclopedia article on the starfish or sea stars belonging to the class Asteroidea.
Photographs and information on the sea stars and starfishes from the Animal Diversity Web.
Encyclopedia article on the starfish or sea stars belonging to the class Asteroidea.
Introduction, characteristics, phylogenetic relationships and fossil record of the sea stars and starfishes, from the Tree of Life Web Project.
Taxonomy and photographs of this brittlestar.
Taxonomy and photograph of this brittlestar.
Research project by Michael Richardson on this species, including its classification, habitat, adaptations, nutrition, reproduction and interactions with other species.
Photographic study by Jaclin Pisano of Protoreaster nodosus with some fine images.
Article on the development of a starfish by Jan Parmentier with many fascinating photographs.
