Mythrax crabs or not?

Do any of you find Mythrax crabs useful? What role to they fit in a reef tank?

 

I don't like them. I think they would probably make superb eel food. They're probably compatible with mantis shrimp, too.

 

My experience is that they redecorate too much.

 

Is that a euphemism for "eat corals and fish?"

 

I have only had several and they seem to disappear only to be found when I take my tank down, for whatever reason, to find that they are huge. I have to agree with Ben and not be a big fan of them. I currently do not have much of a clean up crew, I should really think about restocking a bit.

 

I had one that was constantly creating rock slides.

 

I have several in a few different tanks and can't really tell they do anything for the system. I just think their fun to watch and have not had a problem with them. Did you know they come in red too??

 

I have seen the red ones. Kinda cool.

 

i have one i my tank and he tends to take care of the bubble algae. i have seen him moving some of my frags before though but nothing that an ok size turbo hasn't done already.

 

Mithrax Crabs

Yes, the Green Emerald Mithrax Crabs are actually not found in the reefs, but more in-shore. The Red Mithrax Crabs are closely related to the Greens, and are the true reef-dwellers. You can keep them both in the same tank and they will get along just fine.