Problem with Pleco?

[ostrow]

I wanted to post this in the catfish forum but this is the only one that allows for pics.

Anyway, here are a couple pics of my dwarf bristlenose. I'm wondering about the pattern on the back. What is that???

 

[ostrow]

and another

 

[freshmike]

Looks like velvet or rust......please medicate asap, he is too pretty to lose!!!

 

[ostrow]

He's had this since I got him in March or April.

Most definitely it is not velvet. The spots are normal!!

I'm talking about that sort of heart-shaped pattern in center of his back. Just to make sure.

Never heard of "rust" before. Is there another name for that???