bad or good crab?

[ctxmonitor]

I found this bug in my tank a few night ago. He was able to prevent my detection for at least a year!!

 

[Lobster]

I'd say he's probably gonna do more harm than good. Hairy crabs are usually bad news, especially when they get large. I had a small one that looked similar to this (except he had black claws) that grew to be three inches long and had red eyes. He was naughty so I caught him and put him in the sump.

 

[organism]

that's a bad crab for sure, great catch

 

[bkwudzjeep]

I'd try to get him out of there and stick him in your sump. It kind of looks like a gorilla crab....

Usually any crab that has pointy tips on thier claws is going to be tearing at something.

 

[ctxmonitor]

that crab is the size of my pinky nail.. I'm even suprise that i saw it and caught it, lol..