Tree of Life Project
The Tree of Life Web Project: Animals
Extensive site that contains much information about the various animal phyla. Each phyla gives photos, common examples, scientific names and references. Collection of 1630 websites about bio-diversity.
University of California
Ucmp: Introduction to Ctenophora
This is an advanced level review of the biology of these organisms. The opening photographs are worth seeing!
University of Washington
University of Washington: Ctenophores
This is an advanced essay on the biology of ocean-dwelling "comb jellies."