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Discussion Starter · #1 ·
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?
 

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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?
Guess U need to remove it then...rouge emerald....never would have thought it.....my emerald is pretty docile...
 

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Wait, he was missing legs when he went in, and you haven't seen him since he came out? How do you know something didn't eat his legs, grab him and pull him inside a cave? And then when this thing was done eating him, went and rampaged throughout your tank. Could be a mantis shrimp maybe
 

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Discussion Starter · #8 ·
Good News

I went in and disassembled the front half of my reef. I found the (a?) crab. It is not an Emerald Crab so that means he was a hichhiker on live rock from a year ago. The two Emeralds may be victims too since I haven't seen them in several weeks.
He shell is ~1 1/2" square and ~3 square overall. I'll research what kind he is later.
Jim
 
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