Hitchhiker Crab?

[poochieparker]

Hi

I received my live rock today, and noticed the crab below in one of the holes, we managed to flush him out using a Turkey Baster. Is he bad, we don't have a Sump, so if he his bad he will have to go, whats the quickest and least gory way (freshwater)?

If I leave him in will he kill my hermits, snails, clown and blennie that I will be soon transferring over from another tank?

Information quickly he his sat in a bowl of aquarium water at mo.

Thanks

 

[poochieparker]

Checked all my Live Rock, found another one looks exactly same as other in photo, but smaller, If they won't kill hermits, cleaner shrimp or 2 fish I could put them in the other tank?

 

[Anonymous]

Looks like a emerald crab. But dont take my word for it. I was told the crabs that are bad are the ones that are spiky and or have on claw larger than the other

 

[poochieparker]

These are a dark brown in colour, hairy legs and black pincers. From looking at the web I don't think they are the right colour for Mithrax.

Could they be a specie of Gorilla Crab?

 

[tazdevil]

Wondering if it's possibly a "swimmer" crab, by looking at the hind legs. Hard to tell with it being small yet, but if that's the case, they're not good.

 

[poochieparker]

Whatever species they were, they are now gracing the tanks at my LFS, contacted them earlier, they were more than happy to take them off my hands, I wouldn't have been able to kill them its not there fault they didn't suit my setup.

Thanks all for your replays.

PP