2nd Urchin and possible emerald crab?

[jamal-188]

I have another urchin that is unidenfied who is carrying around a little suction cup and 2 pics of a crab that I bought at my LFS. The crab was in a tank with emeralds and I was told this was an emerald as well but it''s not green?

 

[e-cat]

looks like some type of rock crab, im no expert though

 

[hoveboy]

I think Reeflady is the expert on crab id.
Hopefully she will read this....

 

[ReefLady]

Expert? Eek - not.

It definitely looks like a Mithrax crab to me (commonly referred to as the Emerald crab). There is a species of Mithrax -- Mithraculus forceps - which is almost identical to the Emerald (Mithraculus sculptus), except that it is brown.

I'd say that's probably what you have!

 

[jamal-188]

So, in "theory" he should be reef and invert safe correct?

 

[ReefLady]

Yep - in 'theory' , the crab's behavior and diet should be exactly the same as that of the Emerald.

HTH