noun[mass noun] Biology
Plankton consisting of small animals and the immature stages of larger animals.
- They typically eat insects and floating vegetable matter but their diet also includes zooplankton, aquatic insect larvae, and worms.
- These species are small-bodied, cold water species that are generalist feeders on planktivorous zooplankton and benthic organisms.
- Oil and gas was formed around 100 million years ago when tiny marine plants and animals called phytoplankton and zooplankton floated on the sea's surface.
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