Aquatic biology, organisms, plankton, freshwater biology 65 Zooplanktons-- marine invertebrates, marine zooplankton 12 Marine plankton 6 Plankton 6 Plankton- Ecology-- Food chains-Marine 5 Marine ecology 3 Plankton-- aquatic environment 3 Zooplankton 3 Copepoda (Copepods) 2 Ecology 2 Fishes 2 Himalayan rivers 2 Indus 2 Marine fishes 2 Marine phytoplankton 2 Narmada 2 Phytoplankton 2 Plankton ecology 2 Plankton populations 2 Algae 1 Algae, Blue green 1 Animal plankton 1 Aquatic biology 1 Aquatic ecosystems 1 BIODIVERSITY 1 Bacterioplankton 1 Benthic animals 1 Biological diversity-Idukki reservoir (Kerala) 1 Blue green algae 1 Climate change adaptation 1