Midwater fish
A) Often have bioluminescent organs on the ventral surface
B) Usually have light color on the dorsal surface
C) Can become completely invisible by spreading black cellular structures all over the body surface
D) Are usually very conspicuous and are very vulnerable to attacks from below

Question

Quizplus · Accepted Answer

Midwater fish often have bioluminescent organs on their ventral surface to help camouflage with the light coming from above, making them less visible to predators below.

Midwater Fish