Black spot on clownfish fin?

[Mattj815]

I just noticed this black spot on one on my clownfish. It almost looks like it might be part of his pattern. Im assuming that over time they may change?

Can anyone give me an idea if it looks ok or if it might be something? Just behing his head on lower fin

 

[Big G]

Could be color change or it could be a sting from one of your corals - hypermelanization.