Zooplankton community is cosmopolitan in nature and they inhabit all freshwater habitats of the world. The
zooplankton diversity is one of the most important ecological parameters in water quality and biodiversity assessment because
they are strongly affected by environmental conditions and respond quickly to change in water quality. Zooplankton is the
intermediate link between phytoplankton and fish. The present study deals with zooplankton analysis and its seasonal variation
of Banghara Holi Pokher Ghataho, Dist. Samastipur, Bihar in order to estimate its potency for fish culture during period of Jan.
2017 to Dec. 2017.