Yellow tangs

[minispider]

I have 3 yellow tangs and 2 are displaying redish patches and their bodies, like if they rubbed against something red, they are still eating and look fine atherwise, can some one tell me what that is?

 

[Billybeau1]

Have you read this thread ?

http://www.reefcentral.com/forums/showthread.php?s=&threadid=138705