ostracod is a small crustacean found in a freshwater pond. zooplankton, micro crustacean under the light microscope

aquaculture aquatic biologist biology close closeup copepoda crustacea crustacean crustaceans eye fauna floating fresh freshwater hydrobiology invertebrates lake macro macrophotography micro microbiology micrograph microorganism microphoto microscope microscopic ostracod plankton planktonic pond scientific underwater water zoo zoological zoology zooplankton