Clown Fish sick?

[jaBX1]

I noticed today that the larger of my two clowns had a few black spots on its body.

In the pic you can see one above the fin and one below. There is a third spot on the other side. (sorry for the iPhone pic)

I know ich is white but I have never seen black or even heard of it before.

Can someone help determine if this is a problem/ I need to medicate or quarantine?

Thanks
John