Hydrometra with water-flea 17-06-2001
Hydrometra with Eurycercus
Water-measurer with Water-flea

This Water-measurer had a fat catch: Eurycercus lamellatus, a water-flea that often sits on stems of water plants and thus makes a good target for the flashing spear the sucking mouth of the Water-measurer is. It's a miraculous performance: we humans may learn how to spear a fish, but imagine that spear attached to and moved by your head! The little crustacean is injected with digestive fluids and after that sucked in as "protein porridge". This Water-measurer caught more water-fleas within a few minutes, this one was it's best catch. The Hydrometra is a last instar larva, the adult can be seen on this page. A day later the larva had a moulting, first I thought the bug had perished, but later it appeared to be the skin that was shed off....

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All pictures on this site were made by Gerard Visser (Aadorp, Netherlands), unless stated otherwise. All rights remain with him. These pictures may not be used for purposes any other than private viewing or printing. Do NOT hardlink to these pictures or place them on other websites without the author's approval. Should you need them for purposes which include third parties, you must ask the author permission by e-mail. People, who want to use this pictures for exhibitions or publications or educative material are much encouraged to do so, after approval as mentioned and giving the normal credits.
© G.H. Visser 07-03-2004
rev. 03-02-2007

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