WIM VAN EGMOND / SCIENCE PHOTO LIBRARY WIM VAN EGMOND / SCIENCE PHOTO LIBRARY
Copepod and Volvox colonies. Microscope footage of a single copepod (white) swimming amongst numerous Volvox sp. colonies. Copepods are small aquatic crustaceans that form a large proportion of the zooplankton in marine and freshwater habitats around the world. They are an important link in the marine food chain. Volvox are freshwater unicellular green algae that usually make up larger spherical colonies which behave like a multicellular organisms. Daughter colonies (small green spheres) are produced asexually inside each parent colony, which disintegrates to release them when they are mature.
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