Question

Animals which live on the floor of sea are called benthic

Answer 1

Benthic animals (benthos), refer to organisms who live at the lowest level (floor) of a water body (ocean or a lake or sea), sometimes even permanently attached to the bottom.

Step by step answer: Animals which live on the floor of the sea are called benthic is a true statement. For example, polychaete worms, bivalves, echinoderms, sea anemones, corals, sponges, sea squirts, turbellarians and larger crustaceans such as crabs, lobsters, etc. These organisms are called benthos, or bottom dwellers. There are those called infauna that live buried in the sand, shells or mud. Those that live attached to rocks or move over the surface of the ocean bottom are the epifauna. Benthos is the community of organisms that live on, in, or near the seabed, river, lake, or stream bottom, also known as the benthic zone. Benthos is used in freshwater biology to refer to organisms at the bottom of freshwater bodies of water, such as lakes, rivers, and streams. Although this zone may appear barren, it plays a vital role in the health of aquatic ecosystems. Tiny, microscopic benthic organisms live in this zone and act as a source of food for bottom-feeding animals. Benthic organisms are very important as they are good indicators of water quality. The benthic environment is divided into a number of distinctive ecological zones based on depth, seafloor topography, and vertical gradients of physical parameters. These are the supralittoral, littoral, sublittoral, bathyal, abyssal, and hadal zones.

Note: The term benthic refers to anything associated with or occurring on the bottom of a body of water. The animals and plants that live on or in the bottom are known as the benthos.