good or bad sps crab

[Chicago]

this guy was found on a new acro piece.
he is about half a penny in size.
id please
Good or Bad?
thanks

 

[biggles]

He's a naughty one mate, feeds on coral tissue and especially loves pocil and seri's for lunch. I've killed about 10 over the years that were in fresh wild colonies and all were eating the coral in places.

Edit: have a look down the bottom at the commensal crabs, these are the good guys.

http://www.chucksaddiction.com/hitchcrabs.html

 

[Duna_]

If you (or a friend) has a pico reef or a tank with softies, put him there. They eat vegetable dry food very well. But don't leave it on the acro. Somo acros live well with these kind of acros, but others don't. I had one on a green acro, and no problem, but when he moved to a millepora, the coral kept the polips retracted and the tissue started to disappear.

Mine lives now in the pico reef, and perfect. No SPS, no harm.