Provides photographs and a fact card about shrimp. Discusses where they are found, the variety of species, diet, predators, reproduction, and their similarities and differences from prawns.

A slide show that demonstrates the development of physical structure in the animal world, moving from sponges through mammals.

An excellent interactive site about the physical features of thier crayfish and their functions. This site was created for a college class, but can be used by all ages.

This video explores arthropods, who first made the transition from water to land and who outnumber all terrestrial animals. [5:28] Followed by a short quiz and a list of additional resources to explore.

Learn how the spiny water flea first came to North America, where it has spread to, how to identify it, how it is dispersed, the damage it causes, and what can be done to fight this invasive species.

Wikipedia offers information on arthropods, the largest phylum of animals. Includes scientific classification chart and image.

The Yabby is an Australian freshwater crayfish. Read the description at this website to learn more.

Did you know that sponges are one of the simplest animals that exist? Learn about these multi-cellular animals and their importance to the marine environment.

Meet the acorn barnacle and learn cool facts, its natural history, and conservation status.

Interesting discussion of rotifer anatomy, habitat, feeding habits, locomotion, and species.