Daphnia are small crustaceans more commonly known as "water fleas." They are found in fresh-water lakes and streams and can be easily raised and maintained in a fresh-water aquarium. Their small size and translucent body, which allows one to view their internal organs, is ideal for studying their physiology under a microscope, without hurting the animal.

In addition to the MadSci Files below, the pages on Daphnia at Cornell University's Environmental Inquiry provide a good introduction to working with these creatures. Further material in our Archives may be found running a search for Daphnia on the MadSci Search Engine.

Daphnia Questions and Answers

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