copepod cyclops is small crustacean

copepod cyclops small crustacean 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 found light magnification 100 times objective 10