benthic
adj. 水底的；深海底的
例句
The hectocotylus in benthic octopuses is usually the third right arm.
底栖章鱼中的交接腕通常是第三个右臂。
Anything at or just below the surface of the seabed-the benthic zone, in fishery parlance-gets dragged up.
海底或仅仅在海底表面下一点，用渔业的说法，就是深海底栖带，任何生活在这里的生物都会被拖上来。
The result shows that the benthic macrofauna in theinvestigated area was rare, 56 species were only identified.
调查结果表明：本调查区域大型底栖动物较贫乏，经鉴定有56种；
