diatoms under microscopic view, dark background

algae animal aquaculture aquarium aquatic background bacteria biology cell chain copepod crustacean dark diatoms fauna food freshwater lab laboratory life macro marine micro microbiology microorganism microscope microscopic natural nature nucleus ocean organism ovoid pearshaped peat peniculida phytoplankton plankton pond protozoa protozoan research science sea undersea underwater unicellular university view water wildlife zoology zooplankton