MAREK MIS / SCIENCE PHOTO LIBRARY MAREK MIS / SCIENCE PHOTO LIBRARY
Water fleas. Polarised light micrograph of Daphnia sp. water fleas (order Cladocera). 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. Magnification: x40 when printed 10 centimetres wide.
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