Answer :
Plankton are organisms that are too small to move faster than the currents.
Nekton are larger organisms that can move faster than the currents.
Benthos are small organisms that live on or in the seafloor.
The classification of all living organisms is based on basic, shared characteristics. Each group of organisms is then subdivided into smaller groups. These smaller groups are formed on the basis of more specific similarities within each larger group. Living organisms are classified primarily to avoid confusion, to facilitate organism study, and to learn how various organisms are related to one another.
There are several types of marine organisms. These include several bacterial genera and species, as well as protozoans, planktons, marine invertebrates, and vertebrates. There are three major groups of marine animals based on habitat and mobility: plankton, nekton, and benthos.
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