Crab identification?

[Nemo1]

This crab came on a piece of live rock with coral I just bought any ideas what it is?

 

[Nemo1]

This crab came on a piece of live rock with coral I just bought any ideas what it is?

Forgot to add photo

 

[WVNed]

Looks like an emerald mithrax to me.

 

[Mrs. Herbert]

I'll second it looks like an Emerald crab, good for keeping GHA down.

 

[Nemo1]

Is it safe to keep?

 

[najer]

As above mithrax / emerald, safe.

 

[WVNed]

Yes, they are sold to put in your tank.
https://www.liveaquaria.com/product/prod_display.cfm?c=497+501+628&pcatid=628

 

[BayouReefer]

+1 Emerald crab

 

[Mrs. Herbert]

Is it safe to keep?

yes, I have about 4 in my reef tank, never bothered any of the corals.

 

[Nemo1]

So today I noticed this crab attached to a coral, I guess my emerald crab likes coral unfortunately

 

[shred5]

Yea never liked them as they grow they will turn to coral and other things like snails.
I was loosing cleaner shrimp and could no figure out why until I saw mine catch one.

 

[hllb]

So today I noticed this crab attached to a coral, I guess my emerald crab likes coral unfortunately

They will pick debris and dead tissue off corals. That could be all he's doing. Mine likes to pick algae from in between my zoas but has never harmed the zoas. Keep an eye on him and the coral and see what happens. I feed mine sinking algae wafers too and man he loves those. If he's well fed, he shouldn't bother your corals.

 

[Nemo1]

I moved him off it as I had to head out for work didn’t wanna come home to a damaged coral, If he goes on it again I’ll pay more attention and see if there is any damage done and will also feed him algae too