New tank, live Rock, Full of hitchhiker crabs?

[spawn]

Hi everyone we're new to the hobby and this is our first tank. The tank has been running now for about 11 days. It's got quite a few crabs in it, I think they might be Gorilla's. What is the best way for trapping them/or getting rid of them? Are there any reef friendly fish or others that like crab for dinner? Preferably the first. Thanks.