Senegal Turning Dark Grey

[matejakezman]

i have 2 senegals.

however, i noticed that one of them, the body turned kinda dark greyish/blackish as compared to when i first bought him. is this normal or is this due to stress or some illness?

 

[dante w13]

as long as they dont have spots or they are acting weird give it a few days I would´t worry that much