Water flea, light micrograph
Light micrograph (Composite image of fluorescent microscopy combined with brightfield) of a Simocephalus sp. water flea. Water fleas are small crustaceans, commonly found in fresh water. They are filter feeders that ingest algae, protozoa or organic matter, and are a constituent of plankton. The orange part in the middle are autofluorescing algae in the digestive system of the water flea. This water flea also carries embryos with visible eye-spots under her upper shell. embryos with visible eye-spots under her upper shell. Magnification: x20 when printed at 10 centimetres wide at its longest edge., by HAKAN KVARNSTROM / SCIENCE PHOTO LIBRARY
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