Explanation:

Nekton are swimming animals that can move freely and that are capable of migration from one place to another. Benthos is the community of organisms that live on, in, or near the seabed, also known as the benthic zone.Plankton, the small and microscopic organisms drifting or floating in the sea or fresh water, consisting chiefly of diatoms, protozoans, small crustaceans, and the eggs and larval stages of larger animals. Many animals are adapted to feed on plankton, especially by filtering the water.