Featured Microscopist: Wim van Egmond

Water Flea

Water Flea

Distributed worldwide, approximately 450 species of water fleas have been identified. The vast majority of the organisms are only found in freshwater, but a small handful can survive in the sea. These marine species may, however, appear quite different than their inland relatives. Typically, water fleas feature a discrete head, a compound eye, pronounced antennae, and a protective carapace that surrounds the trunk and abdomen. The carapace, which appears to be composed of two separate sections although it is actually formed from a single piece, may sometimes enclose the head as well, and in at least one species is significantly reduced in size. Reaching lengths as great as 18 millimeters, the predatory water flea Leptodora seems to have outgrown the traditional carapace, but retains the truncated structure as a brood sac.


Photomicrographs are © 2000-2022 by Wim van Egmond.
All Rights Reserved under copyright law.
© 1995-2022 by Michael W. Davidson and The Florida State University. All Rights Reserved. No images, graphics, software, scripts, or applets may be reproduced or used in any manner without permission from the copyright holders. Use of this website means you agree to all of the Legal Terms and Conditions set forth by the owners.
This website is maintained by our
Graphics & Web Programming Team
in collaboration with Optical Microscopy at the
National High Magnetic Field Laboratory.
Last modification: Monday, Dec 01, 2003 at 12:54 PM
Access Count Since September 15, 2003: 8388