Daphnia sp. water fleas swimming in water, seen through a microscope and lit from behind. These are freshwater aquatic crustaceans that swim by beating their antennae, and feed on algae, bacteria and protozoa. Daphnia is a popular model organism in biological research, as its transparent carapace permits easy observation of its organs. Adults can reach around 2mm in length. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Stammers, Sinclair |
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