hole in my fish? help

[sullbra]

There is a pretty decent size hole in the side of my Mandarin, a little smaller than the size of a pencil eraser. It looks like you can see into the fish. Also, the hole is a little white around the edges.
He seems to be acting normal, he just has a gaping hole in the side of him behind his side fin.
Also, when he goes near the cleaner shrimp, they tend to go straight to the hole, and it seems to upset the Mandarin.
Is this a bite, or a parasite. While he die?
Any advice? Prevention? notsure:
He is in reef tank with mainly SPS.
size: 37 gal
enviroment: live rock/sand, 120 V compact, good to decent chemistry.
Live stock:cleaner shrimp, shrimp gobe, pistol shrimp, serpent star, percula clown, Cardinal, hermit crabs, snails, anenome crab, emerald crabs, horsehoe crab
Food: frozen brine/frozen myrid/flake/bloodworms

 

[beth]

What does the wound look like? Is it an open sore that looks raw, reddish, swollen...like a wound, or it an area that looks more tumorish?

 

[sullbra]

I got a picture of him 1 of 2

 

[sullbra]

actually, only one of one

 

[nm reef]

sullbra...sorry but the same thread was in the reef forum. I thought you'd have better luck over here so I moved it. I'm sure the folks here will be helpful...best of luck.