Firefish! Nemateleotris magnifica

[Beano1169]

Hey all I have some questions my firefish in my tank has developed a blackish/greyish splotch on the top of his head. Its and odd discolouration and I was just curious if anyone has dealt with something similiar? Any suggestions would be greatly appreciated :mrgreen: but other than that he has been eating like crazy swimming around lots and enjoying his time in the tank very much so!

[toytech]

do you have a tank cover , the ones i had where jumpy fish , they never got spots on the top of there head but my fairy wrasse got weird colors on the top of his head when he bounced off the plexi.

[Beano1169]

yah that might be it. Cause i do have a small thin plastic lid above the tank.