Open-water fish have light-colored bellies and dark-colored backs in order to blend into the pelegic environment.This is known as:

Question

Quizplus · Accepted Answer

Countershading is the coloring pattern where the ventral side of the animal is lighter in color and the dorsal side is darker. This help the open-water fish to blend into the pelagic environment where the sun is shining from above and the dark back helps them to blend into the dark water below.

Open-Water Fish Have Light-Colored Bellies and Dark-Colored Backs in Order