Gotcha!! Look what I caught...

[amber3cat]

Emerald crabs do turn black when they age so maybe just emerald crab?

 

[najer]

This was from my big guy 2 years ago next month, it's a lot bigger now.

DSC03740 by sshipuk, on Flickr

 

[fishybizzness]

Btw, smart way to catch it using a glass!!

 

[Jose Mayo]

It looks like a Xanthidae crab, maybe Chlorodiella sp, like the one below:

Regards

 

[MagicMarker]

It looks like a Xanthidae crab, maybe Chlorodiella sp, like the one below:

Regards

Yeah urs looks a lot like mine. Just did a quick read on them and seem relatively reef safe. Thx for the reply!

 

[MagicMarker]

Btw, smart way to catch it using a glass!!

Thx, stole the idea from much reading on this site!

 

[RandyT5]

Mines pretty big too! Mine is a lot more hairy but still has the flat claws. never seen him do any harm to anything except algae, cowers in fear if a clownfish swims by him.

https://www.reef2reef.com/threads/gorilla-crab.341977/#post-4271779

 

[Vincent100]

Black mithrax , he's exactly the same as mine
In my opinion they can be hit or Miss
Mine got big enough to pick a scoly up that I had just fed and dragged it under my rock work
He's still lurking about in my tank now and doesn't fall for any of the traps I set for him .

As najer said he's had one for ages and doesn't cause a problem in his tank that's why I'll say their hit and miss

 

[MagicMarker]

Black mithrax , he's exactly the same as mine
In my opinion they can be hit or Miss
Mine got big enough to pick a scoly up that I had just fed and dragged it under my rock work
He's still lurking about in my tank now and doesn't fall for any of the traps I set for him .

As najer said he's had one for ages and doesn't cause a problem in his tank that's why I'll say their hit and miss

Yeah, I just don’t see any reason to take the risk, now that I’ve caught him. I’ll throw a few rocks down into my sump and he’ll have the whole 24 gallons to himself!
Thx for the reply!