The plant and animal organisms that live on the sea floor Often divided into two categories: deep-sea benthos, below 200 meters and the littoral benthos, from 200 meters to the high-water spring tide level
A group of organisms, most often invertebrates, that live in or on the bottom in
Those forms of marine life that are bottom-dwelling; also, the ocean bottom itself Certain fish that are closely associated with the benthos may be included
The whole group of organisms in a water body (pond, lake, or river) which crawl about on the bottom, or burrow into the bottom, or grow attached to the bottom Those aquatic organisms that are carried passively by water currents or the wind are termed plankton and those that swim actively and may move long distances for feeding or breeding purposes, nekton