Killer crabs smarter than me

[Rani]

So I've noticed 3 large crabs in my tank over the past few weeks - one black the other 2 big and hairy, creating havoc with my corals. Tonight it seems my peppermints are missing.... I've tried countless traps / bait in glasses to no avail. I'm now fearing for my fish and corals. Please help!!!!


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[MurphyLong]

From what I remember about crabs...
Hairy = Bad.
Black = Bad.

Would you be able to spear them?

 

[Papermonkeys]

Emeralds have hairy legs though, should I be worried?

 

[allendehl]

...and how can 3 big hairy black crabs just popup in a tank? Did you recently added live rock they could have taken a ride on?
I know this gives you zero help but just curious.

 

[JC Slater]

I had 2 gorilla crabs hitch hike in on a wild coral colony I bought once. It was a Monti. Cap. and I noticed it missing some polyps. Finally caught a glimpse of one of them pretty quickly. I basically lured him out with some frozen food and then grabbed him with my reef tweezers. Fast forward a couple months. Saw the second one. Took me another month or so to catch him with the tweezers. Sneaky lil guys. They would burry deep inside rocks and then come out at night but you have to be careful and quick as they get scared by light and scurry back under rocks. Good luck!