Black Watchman Goby turning yellow

[Frogmeister]

Hello, I've had a black Watchman Goby for just over a year now but lately it's turning yellow. It still looks healthy but just wondered if it turning into a regular yellow one or if it's sick. Thanks

 

[carey]

I've never seen a Black watchman goby, do you have a picture?

i know my yellow watchman turned pure white about 6 months ago and has stayed healthy and is fine. Not sure why he changed colors but other than the white he is good.