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Porifera
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Description of the sponges and their taxonomy, from the Animal Diversity Web.
http://animaldiversity.ummz.umich.edu/porifera.html
An article by Floyd Sandford about the sponges that are carried around by hermit crabs.
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Hermit Crab Sponges Pagurus impressus in hermit crab sponges, Dog Island, Florida. Photo 2: A larger Pagurus impressus from Dog Island, Florida in the opening of a bright orange hermit crab sponge. Several empty sponges, each of which originally contained a hermit crab...Photographs of four Classes of sponges in the Khoyatan Marine Laboratory.
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Khoyatan Sponge Page Sponges of The Northeast Pacific Laboratory houses a moderately large collection of NE Pacific Sponges. This material has been worked on by Bill Austin and Bruce Ott. A list of 260 species from central California to southern Alaska is recorded by Austin (1985 Approximately 30...A central clearinghouse for sponge researchers, including a porifera listserver bulletin board and who's who in sponge research.
http://www.mailbase.ac.uk/lists/porifera/files/
Descriptions of sponges by Curt Smecher.
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The Sponges of BC Their systematics and taxonomic history are also discussed. Introduction Sponges have been known for their commercial value since the time of Aristotle. During the many centuries since then little attention has been paid to them. Serious study of the group...Beautiful annotated photographs of sponges (Porifera) of Antarctica.
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Underwater Field Guide to Ross Island McMurdo Sound, Antarctica Click on each organism to view more information volcano sponge Anoxycalyx (Scolymastra) joubini sponge Asbestopluma aff. lycopodina fan sponge Calyx arcuarius spiky sponge Cinachyra antarctica orange dendritic sponge Clathria (Axosuberites) nidificata cactus sponge Dendrilla antarctica brain sponge Guitarra fimbriata finger...