SPS crab.. Bad or Not

[Mikef1]

I have recently noticed a small brown crab with white eyes in one of my smaller acro colonies. He seems to be picking at the ends of 2 branches and they look as though they are losing a little tissue. The colonies polyps have been fully extented with good coloration but I am just wondering if this is a good or bad crab? I am used to the normal white acro crab but havnt seen this before.

 

[Anonymous]

If he's picking at the polyps, I'd scrap him. I normally leave them alone unless they're causing actual damage like you've indicated.

Jim

 

[Mikef1]

Thanks Jim!!

I managed to get him out by chasing him with the end of a paper clip and then grabbing him with tweezers. I am sure he is the culprit and im sure the very small amount of tissue will grow right back. Like I said other than that the colony looks great and has colored up really nice. I ended up putting the crab in fuge.

 

[fcmatt]

is there enough food in the tank, algae wise and etc, to feed your
crabs? maybe your rock is so algae free they need to find some
other food source?