Water and benthic sediment samples were collected from the seagrass bed located in the southern sector of Chilika. Water samples were collected using zooplankton net where as seagrass sediments were collected usinga Van Veen grab sampler. Samples were stained with the Rose Bengal stain and mounted on glass slide for observation under foldscope. Zooplankton such as Cladocerans and Copepods were seen. Polycheates were found associated with seagrass benthic sediments.