copepod cyclops is small crustacean found in freshwater pond. zooplankton, micro crustacean

copepod cyclops small crustacean found freshwater pond zooplankton micro biology zoology macro research science nature aquatic nauplius zoological plankton lake water planktonic fauna zoo microscope macrophotography microphoto microscopic floating crustacea scientific fresh underwater micrograph closeup microbiology aquaculture eye crustaceans antennae copepods microorganism copepoda hydrobiology biologist invertebrates close light magnification 100 times objective 10