Zoa turning black

[Tysob44]

So I got a sunny d in a trade and looked good when first opened in tank 2 days later I noticed it was open but all black no orange to it at all... Then it closed for a day and now it's back open but still black ... Got some armor of gods at the same time they look great and some gorilla nipples which never opened since I got them any ideas I can send pics if it helps

 

[tdurr7]

Pictures always help. Never seen them turn black

 

[Tysob44]

 

[i_am_poor]

I want to check this out..

 

[peasofme]

they're turning brown. what light you have?