Additional
Information: The Phylum Porifera includes the animals commonly known as sponges. This is a diverse group, with about 5000 known species. Most are marine, but around 150 species live in fresh water.
Considered the simplest of the animals, the cells of sponges a
Hermit Crab Sponges Hermit Crab Sponges: An article by Floyd Sandford about the sponges that are carried around by hermit crabs. (Porifera) http://www.public.coe.edu/departments/Biology/hermit.html
Porifera Biology on the WWW Porifera Biology on the WWW: A central clearinghouse for sponge researchers, including a porifera listserver bulletin board and who's who in sponge research. (Porifera) http://www.mailbase.ac.uk/lists/porifera/files/
The Sponges of British Columbia The Sponges of British Columbia: Descriptions of sponges by Curt Smecher. (Porifera) http://www.interchg.ubc.ca/csmecher/sponge.htm
Introduction to Porifera Introduction to Porifera: A good start on the biology of sponges, including phylogeny, life history, and ecology. (Porifera) http://www.ucmp.berkeley.edu/porifera/porifera.html
Khoyatan Sponge Page - Sponges of The Northeast Pacific Khoyatan Sponge Page - Sponges of The Northeast Pacific: Photographs of four Classes of sponges in the Khoyatan Marine Laboratory. (Porifera) http://mareco.org/spongepage/index.htm
Phylum Porifera (Sponges) Phylum Porifera (Sponges): Description of the sponges and their taxonomy, from the Animal Diversity Web. (Porifera) http://animaldiversity.ummz.umich.edu/porifera.html