zooplankton
noun/ˌzuːəˈplæŋktən/, /ˌzəʊəˈplæŋktən/
/ˌzuːəˈplæŋktən/, /ˌzəʊəˈplæŋktən/
[uncountable] (biology)- plankton that are very small forms of animal life that live in water
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zooplankton