help out

It looks like a Steene's dottyback (Pseudochromis steenei). Check this link. http://www.reefkeeping.com/issues/2002-02/hcs3/ Scoll down until you see a pic of the Steene's dotty. The paragraph above the pic has info about this fish. You really should read that article and you may consider returning it to where you got it from. Have fun!

I've had a few dottybacks, every time I moved my tank they found a very deep hole in the live rock and went inside of it, instead of staying in the tank water like the other fish - that's probably what happened w/ yours, they had it in the tank w/ the live rock and it tried hiding inside a deep hole - nice looking fish They do get crazy aggressive though

yep to joshnemily and madtownmax's comments. i've always wanted a steene's cuz they are just one of the most gorgeous dottybacks ever. they're just a bit too anti-social for me. i had a strawberry psuedo that decided to hitch a ride in my live rock as well. i always thought that the stories were rumors or made up, but they really do dive into a hole and camp out. lol.