FRANK FOX / SCIENCE PHOTO LIBRARY FRANK FOX / SCIENCE PHOTO LIBRARY
Rotifer. Darkfield illuminated light micrograph of a rotifer (phylum Rotifera), showing developing young inside. Rotifers (phylum Rotifera) are microscopic aquatic animals that are related to roundworms. Most lay eggs but some, as here, retain the eggs inside their body until they hatch. Magnification: x267, when printed 10 centimetres wide.
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