Water Flea Anatomy
- A mouse-over image of Daphnia longispina that enables identification of its anatomical features, with close-up images of many of them.
- http://www.microscopy-uk.org.uk/mag/artmar02/fleanatomy.html

Waterflea Circus
- Photograph gallery of about ten species of waterflea.
- http://www.microscopy-uk.org.uk/micropolitan/fresh/flea/index.html

Water fleas
- Information and several fine photographs of these small crustaceans.
- http://www.microscopy-uk.org.uk/mag/artjun99/wflea.html

The Water Flea
- Information on this branchiopod which is used in environmental monitoring as well as palaeoecological investigations.
- http://www.homepages.ucl.ac.uk/%7Eucfagls/thewaterflea/

Cladocera
- Offers an illustrated body plan of a daphnia or water flea, with a numbered key, and details of the major features of its anatomy.
- http://www.cladocera.de/cladocera/cladocera.html

Wikipedia: Cladocera
- Details of anatomy and taxonomy on this type of small crustacean.
- http://en.wikipedia.org/wiki/Cladocera