Benthic

The benthic zone is the ecological region at the lowest level of a body of water such as an ocean or a lake, including the sediment surface and some sub-surface layers. Organisms living in this zone are called benthos, e.g. the benthic invertebrate community, including crustaceans and polychaetes. The organisms generally live in close relationship with the substrate bottom and many are permanently attached to the bottom. The superficial layer of the soil lining the given body of water, the benthic boundary layer, is an integral part of the benthic zone, as it greatly influences the biological activity which takes place there. Examples of contact soil layers include sand bottoms, rocky outcrops, coral, and bay mud.

Das Benthal ist der Lebensbereich (Biotop) am, auf und im Boden eines Gewässers.

Bental, strefa bentoniczna (gr. bénthos 'głębina') – strefa denna zbiornika wodnego. Cechy charakterystyczne tej strefy to bardzo mała ilość światła lub jego brak, mała ilość tlenu, niska temperatura oraz większe ciśnienie. Organizmy zasiedlające strefę bentoniczną nazywane są bentosem.