Guess U need to remove it then...rouge emerald....never would have thought it.....my emerald is pretty docile...On 3/30 I posted about an Emerald Crab going into a 'cave' and walling itself in and asked if this was normal molting behavior. Well, he/she came out of it after about three weeks because the wall was knocked down from the inside.
Since then I've lost a Harlequin shrimp, a cleaner shrimp and a scarlet shrimp. I found the cleaner shrimp tail that was cleanly severed. Today I found that the Coco worm had been pulled out of it's tube and the heads are mostly gone. I threaded it back into the tube and after a few hours it has extended it's butchered head. I had found it near the 'cave'. (sidebar- interesting looking creature).
My fish are simple/safe types and one brittle star was seen once.
I feel I now have a monster crab that I have to remove. Thoughts?