Odd behavior ... Clown Tang

[sjwitt]

I have a Clown Tang, very healthy ... very bossy. He has displayed this odd kind of 'flashing' on my brain corals. It's really weird, he loves to swim over them, turn sideways and rub across them. I have 4 pretty good sized corals and he just goes from coral to coral and rubs against them. He doesn't rub on anything else, just the brains. There is no sign of any parasites and he's healthy and happy. Anyone seen similar behavior? Just curious.

 

[snorvich]

When was the last fish added to this tank?

 

[sjwitt]

This was the last fish added along with 3 pajama cardinals. That was March of 2011. No new fish added since that time... a few corals since then but really nothing for at least 4 months.

He was very small when I got him, he's about 4.5 to 5 inches now. He's done this for as long as I can remember... like he's grooming himself on the corals. He doesn't rub against anything else, only the brain corals.