Is this a gorilla crab?

[a49panhead]

Title says it all. If not a gorilla crab. What kind could it be. Good or bad. I first noticed it when it was about the size of a nickel. Now it’s about 2”. I’ve only seen it picking at rock up till recently. It was picking at a snail shell. Lfs suggested looking into gorilla crabs. Thanks in advance

 

[SomethingfishyPKNY]

Title says it all. If not a gorilla crab. What kind could it be. Good or bad. I first noticed it when it was about the size of a nickel. Now it’s about 2”. I’ve only seen it picking at rock up till recently. It was picking at a snail shell. Lfs suggested looking into gorilla crabs. Thanks in advance

Is it dark green?

 

[Neo Jeo]

Looks like a burnt emerald crab ;Nailbiting

 

[WV Reefer]

Title says it all. If not a gorilla crab. What kind could it be. Good or bad. I first noticed it when it was about the size of a nickel. Now it’s about 2”. I’ve only seen it picking at rock up till recently. It was picking at a snail shell. Lfs suggested looking into gorilla crabs. Thanks in advance

I can’t see the claws well enough but Algae eating crabs will have “flat scoops” at the tips of the claw instead of sharp points.

 

[Katrina71]

@Lovemyreef2015 check this guy out!

 

[S-t-r-e-t-c-h]

Looks like a burnt emerald crab ;Nailbiting

There are a bunch of Mithorax crabs that are just like emeralds, just different color. I'd try to sump that guy though. I'm usually an emerald crab apologist, but those big males are equipped to do damage.

 

[VSVP bet]

Agreed, any large crab can become a fish killer. Usually at night when your fish are asleep, lost a juvy yellow tang like this, havent gotten any type of crab (excluding hermits) since.

 

[reeftivo]

could be an gorilla crab (several variations) but looks more like an emerald. my emeralds turned dark like that after they grew.

before it starts eating everything (corals, fish etc..) trap it and get it out. they eat anything but the rockwork.

more common pic of gorilla crab;

 

[SomethingfishyPKNY]

could be an gorilla crab (several variations) but looks more like an emerald. my emeralds turned dark like that after they grew.

before it starts eating everything (corals, fish etc..) trap it and get it out. they eat anything but the rockwork.

more common pic of gorilla crab;

I agree I'm leading towards emerald I have a few on steroids lol true monsters but they dot bother anthing

 

[a49panhead]

Is it dark green?

Isn’t very dark. Almost black

 

[a49panhead]

I can’t see the claws well enough but Algae eating crabs will have “flat scoops” at the tips of the claw instead of sharp points.

I’ll try to get a pick of claws. But at the end they look like small disk

 

[Lovemyreef2015]

Looks like a type of xanthid species. Here is a picture of one. I would remove it.

 

[a49panhead]

Thanks for all. The input. Now to try to catch it and put in sump

 

[a49panhead]

If there was any doubt. Here it is. Any suggestions on how to get it out

 

[a49panhead]

After some quick research

 

[KJ]

Look like Mithrax crabs to me.