Arrow Crab threat

pppman

New Member
I am having trouble with my Arrow crab getting picked apart in my 55 gallon tank. It has lost a pincher and a leg so far.
Along with the Arrow Crab I have:
1 Yellow Tang
1 Three stripe damsel
1 Domino Damsel
1 Six-line Wrasse
2 Cleaner Shrimp
1 Sea Urchin
Which of these do you think is the culprit?
I have a 20 gallon tank I could transfer the Arrow Crab that has
1 Domino Damsel
2 Cleaner Shrimp
I don't wnat to transfer the crab until Iknow he will be safe in the other tank
Thanks in advance for your help!
 
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