emeralds not always reef safe?

For your googling pleasure:

Red likely Mithrax ruber (</em>typically off shore reef crab).
Green if you are lucky are Mithrax sculptus</em> (in shore herbivor).

I am not familiar with white ones but they may not be Caribbean/Atlantic so I would have have little/no exposure.
 
I guess nonmembers can't edit at all now (sigh)

The little guy that ate brissles and lost arms (the link provided in the post is a video) was sent as a sculptus</em> and was either a different species or became a meat eater when he could not graze. I wish I knew for sure as a crab that would keep brissles under control would be a welcomed animal if it did not pick on corals. I have been tempted to remove a claw to see but just can't make myself do that. I don't keep many hard corals but I don't think he could have attacked soft or hard one with his incapacitation so I lean toward them being able to alter their diet if algae is not attainable.

From this experience and observations of a red mithrax, it appear that this group may not regenerate limbs like most other crabs.
 
+1

nanonano;493372 wrote: i never see my green emerald unless it's pitch black in the room and i surprise him by turning on the lunar leds. He hates light. So i have no idea if he's messing with the frags.
 
its 50/50 with mine.
my current crew comes and goes with lights on.
the white one doesnt like lights though.
 
Aren't most crabs scavengers? I think most of them will eat whatever it takes to stay alive. Don't trust em!
 
My buddy's emerald liked to snack on his Kenya Tree, which isnt a terribly bad thing, but he still did it.

Hows the 33 doing?

-Carlo
 
yeah its not my green emerald that did it just my red one but he is now in quarantine awaiting trade/sale/donation whatever and the cany cane seems to be regrowing pretty quickly, so all is well.

The 33 is doing good most of its inhabitants will be moving to a 24g nano cube and the 33 is gonna serve sump duty for the 125 i just got.Originally I was gonna use the stand i got from you for the 55 that i had so i could do a sump/refugium setup since the 55 currently resides on top of a dresser.Then I found a deal on a 125 and stand that i couldnt pass up and figured if im gonna tear down my tank i might as well go bigger.
 
I have never had a problem with my emerald crab. He usually minds his own business.
 
I've had mixed results with emeralds. My current set seem to be behaving themselves. My previous set though loved my yellow polyps. They tore through probably 75% of them before I caught them and pulled them out.
 
Keep them well feed ad they re fine , but if they dont get enough food... well crab will be a crab
 
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