Question

Adaptation in the basis of light penetration explanation

Answer 1

Deep sea is characterized by a set of environmental conditions, which in turn determine the adaptations of deep-sea forms.

Of all the oceanic zones, light penetrates only into the euphotic zone; the remaining zones are aphotic or devoid of light (bathyal, abyssal and hadal zones).

The term hadal zone is used to designate the perpetually cold and dark supreme depths of the ocean.