noun
benthic animal; zoobenthos
Technical term in zoology for animals living on or in the bottom of a body of water.
See also: 底生 (ていせい)
底生動物は水底の環境に適応している。
Benthic animals are adapted to the bottom environment of water bodies.
底生 is the broader term for 'benthic' or 'bottom-dwelling', while 底生動物 specifically refers to the animals.
Compound of 底生 (benthic, bottom-dwelling) and 動物 (animal).