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♤ Zooplankton play vital role in food web of the food chain, nutrient recycling, and in transfer of organic matter from primary producers to secondary consumers like fishes.
♤ They are more abundant within mangrove water-ways than in adjacent coastal waters, and a large proportion of the juvenile fish of mangrove habitat are zooplank-tivorous.
♤ The zooplankton determine the quantum of fish stock. Hence, zooplankton communities, based on their quality and species diversity, are used for assessing the productivity vis-a- vis fishery resource, fertility and health status of the ecosystem.
♤ Tiny flagellates, giant jellyfish (>50 pm).