Plankton

thumb|upright=1.5| Part of the contents of one dip of a hand net. The image contains diverse planktonic organisms, ranging from [[photosynthetic cyanobacteria and diatoms to many different types of zooplankton, including both holoplankton (permanent residents of the plankton) and meroplankton (temporary residents of the plankton, e.g., fish eggs, crab larvae, worm larvae). 100 μm = one tenth of a mm.]]

species of cnidarian

species of cnidarian