Home > Science > Biology > Flora and Fauna > Animalia > Echinodermata > Asteroidea
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.
http://animaldiversity.org/site/accounts/information/Asteroidea.html
Photographs and information on the sea stars and starfishes from the Animal Diversity Web.
http://www.sms.si.edu/irlspec/Amphiod_pulchel.htm
Taxonomy and photographs of this brittlestar.
http://www.sms.si.edu/irlspec/Amphiop_thromb.htm
Taxonomy and photograph of this brittlestar.
http://bioweb.uwlax.edu/bio203/s2007/richards_mic2/
Research project by Michael Richardson on this species, including its classification, habitat, adaptations, nutrition, reproduction and interactions with other species.
http://tolweb.org/Asteroidea/
Introduction, characteristics, phylogenetic relationships and fossil record of the sea stars and starfishes, from the Tree of Life Web Project.
http://www.microscopy-uk.org.uk/mag/artnov04macro/jpstarfish.html
Photographic study by Jaclin Pisano of Protoreaster nodosus with some fine images.
http://www.arkive.org/common-starfish/asterias-rubens/
Photographs and information from ARKive including classification, status, description, range, habitat, biology, threats and conservation.
http://www.microscopy-uk.org.uk/mag/art98/janstar.html
Article on the development of a starfish by Jan Parmentier with many fascinating photographs.
http://www.indiana.edu/~librcsd/etext/hoosier/PA-24.html
Illustration and brief description of these stemless echinoderms that have a central disc from which five or more arms radiate.
http://en.wikipedia.org/wiki/Asteroidea
Encyclopedia article on the starfish or sea stars belonging to the class Asteroidea.
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