Bad Crab?

[shanedag]

Been watching this one from my import of live rock. It’s super sensitive to movement and lightning fast. Anybody able to ID? I thought maybe Xanthidae but I can’t tell:

 

[TriggerFinger]

It’s some kind of filter feeding type; I can see the little fans waving around. They are not harmful to your tank though

 

[JGT]

Doesn’t look hairy so not a gorilla crab. Should be fine.

 

[shanedag]

Thanks guys. I was hoping to not have to try and capture this one

 

[Devin6871]

Porcelain Crab! They are a type of squat lobster. Excellent filter feeder. They like to hang out under ledges and if they get used to you will begin to come out and openly feed at tank feeding time.