water flea daphnia magna is a small planktonic crustacean undermicroscope view

adult anatomy animal antenna background biology black cell cladocera compound crustaceans daphnia division ecology education egg eggs environment fauna fish flea fleas flora food freshwater heart heartbeat laboratory lesson life light macro micro microbiology microorganism microscope microscopic microscopy nucleus plankton pond protozoa pulex science small training water wildlife zooplankton