CRABS... emerald crabs...? crud! help!

lilduud

Reefing newb
i bought a medium to small emerald crab the other day as i saw a very small patch of bubble algae and wanted to get rid of it soon... but now it looks like hes eating off of my birdsnest coral! any advice... its hard to tell if hes just crawling around on its framework and hiding or if hes eating... hes moved to the back and i cant really see him other than the legs clinging to the birdsnest. obviously its shrivled in that area cause hes crawling on it but i cant see if tis eaten off.
 
Wait till it has opened up and if you see its being eaten, remove the sucker. Other than that, dont jump to any conclusion, could just be innocent gallivanting on his part :P
 
yea im pretty sure he is an emerald... hes green and small and looks like an emerald... he had a little hair algae on his legs and body but his shell is definitely the right colour.
it doesnt look like there are any eaten pieces but he was mostly on the back so il have to check when hes off of there and before i do my "operation" hah
 
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