super macro close up of daphnia pulex, the most common species of water flea.

americas anatomy animal aquatic australia biology cell chain close closeup college common crustacean crustaceans daphnia daphniidae division environment europe fauna first fish flea fleas flora food found freshwater genome have heart heartbeat invertebrate its laboratory lesson life light macro micro microbiology microorganism microscope microscopic microscopy most muscle nucleus organism plankton pond protozoa pulex research school science sequenced small species super training transmitted water wildlife