A good start on the biology of sponges, including phylogeny, life history, and ecology.
An article by Floyd Sandford about the sponges that are carried around by hermit crabs.
Article by William Amos on sponges and their general biology, and the pistol shrimp and other creat...
A central clearinghouse for sponge researchers, including a porifera listserver bulletin board and ...
Species list from the USGS on the nonindigenous sponges found in US waters, with factsheets and col...
Gallery of photographs of a number of species.
Description of the sponges and their taxonomy, from the Animal Diversity Web.