Cnidaria- Arizona's Tree of Life Web Page. Pictures, characteristics, phylogenetic relationships, references on cnidarians.
Cnidaria Home Page- Many aspects of cnidarian biology are described here, from morphology to molecular evolution. This site, supported by the University of California–Irvine, has many links to other sites.
Introduction to the Cnidaria- University of California at Berkeley Museum of Paleontology. Links to the fossil record, life history and ecology, systematics, and morphology. Many links to the different classes.
Phylum Cnidaria- Animal Diversity Web, University of Michigan. Pictures of cnidarians and descriptions, links to other pages on each of the four classes of cnidarians.
Phylum Cnidaria- This site is from the University of Minnesota.
