Emerald Crab and.... not sure. Seems fast and digs rear-end into the sand

[Staplesofficewar]

Just got to emerald crabs from Harrys. One is def an emerald... one, not sure.

pretty fast moving around tank and buries rear end into the sand to hide.

 

[ISpeakForTheSeas]

one, not sure.

That one looks more like a Xanthid crab or similar to me - if I had to guess, maybe a Cataleptodius or Leptodius species, but I really don't know for sure on this.

Regardless, that one's probably not reef-safe.

 

[Staplesofficewar]

Looks a lot like the Cataleptodius for sure. When I hit him with a light in the QT tank he really moves fast! The real emerald just hangs out.

 

[Tyler Drehobl]

Plus one on it being a xanthid crab, definitely not reef safe and should be removed or banished to the sump

 

[littlefoxx]

Crabs with black claws usually mean bad lol