Aphotic and Crepuscular

Aphotic adjective - Lacking light; especially not reached by sunlight.

Crepuscular and aphotic are semantically related in lack of light topic. In some cases you can use "Crepuscular" instead an adjective "Aphotic".

Crepuscular adjective - Like twilight; dim.

Aphotic and crepuscular are semantically related in lack of light topic. Sometimes you can use "Aphotic" instead an adjective "Crepuscular".