They are a group of marine organisms that drift along with ... As plankton is a collection of different types of organisms it also varies both in appearance and size. They can be microscopic ...

The World Register of Marine Species (WoRMS) lists all known species of marine organisms and is an essential resource for researchers looking at patterns of marine biodiversity on a global scale. The ...

The oldest fossils are remains of marine organisms that populated the planet's oceans. When they died, the plants and animals were buried by mud, sand, or silt on the sea floor. Land animals and ...