Porifera
Hermit Crab Sponges
An article by Floyd Sandford about the sponges that are carried around by hermit crabs.
Introduction to Porifera
A good start on the biology of sponges, including phylogeny, life history, and ecology.
Khoyatan Sponge Page - Sponges of The Northeast Pacific
Photographs of four Classes of sponges in the Khoyatan Marine Laboratory.
Phylum Porifera (Sponges)
Description of the sponges and their taxonomy, from the Animal Diversity Web.
Porifera Biology on the WWW
A central clearinghouse for sponge researchers, including a porifera listserver bulletin board and who's who in sponge research.
Underwater Field Guide to Sponges of Ross Island & McMurdo Sound, Antarctica
Beautiful annotated photographs of sponges (Porifera) of Antarctica.
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