Little light penetrates this zone and thus the inhabitants are all heterotrophic, depending on the littoral and sublittoral organisms for basic food materials.
Little light penetrates this zone and thus the inhabitants are all heterotrophic, depending on the littoral and sublittoral organisms for basic food materials.
透过此区域的光很少，因此栖息生物都不是自养的，主要以浅海的和远浅海的生物作为基本食物来源。