Mesopelagic Fishes Usually Have Their Photophores

Question

Mesopelagic fishes usually have their photophores
A) Concentrated on the dorsal surface
B) All over the body
C) Hidden unless they swim toward the surface
D) Concentrated on the ventral surface

Accepted Answer

Mesopelagic fishes typically have photophores concentrated on the ventral surface to help with counter-illumination, which helps them blend in with the light coming from above and avoid predators.