University of California
Ucmp: Porifera
Detailed site, lots of pictures, and easy to understand descriptions of the phylum known as Porifera. This one is a winner!
University of California
Ucmp: Phylum Porifera
Click on the name of the class of sponge you want to know about, and you'll see a picture and a description of it.
Missouri Botanical Garden
Missouri Botantical Garden: Sponges!
This site from The Evergreen Project gives an easy to understand description of the Sponges.
Other
Coe College: Hermit Crab Sponges
An interesting article about a kind of sponge that a hermit crab carries around on its back.
Wikimedia
Wikipedia: Sponge
Wikipedia offers detailed information on sponges, or poriferans, animals of the phylum Porifera.
University of California
Ucmp: Morphology of Sponges
This site from the University of California discusses the structure of sponges and how these primitive animals manage to exist.
Other
Sponges, Phylum Porifera
Discusses sponges that may be kept in salt-water aquariums, along with what they need to live. Good general information.
Biology 4 kids
Biology4 Kids: Sponges the First Invertebrate
Find out about some the most simple organisms in the Animal Kingdom, the sponges.
Encyclopedia of Life
Encyclopedia of Life: Sponges
The Encyclopedia of Life presents this in-depth overview of Sponges (Porifera), including their habitats, size, conservation status, and much more. Images of this phylum and maps of its global distribution can also be found here.
National Health Museum
Access Excellence: Carnivorous Sponge
Read about this startling discovery of a species of sponge that is not a filter feeder like all other sponges, but is actually carnivorous. Strange!
University of California
Ucmp: Life History and Ecology
Learn how sponges eat, grow, reproduce on this colorful page.
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.
Other
Kids' Cruz: Taxonomy
Kidzcruz.com provides a list of phylums in the animal Kingdom. Both Latin and English names are included.