What is this…

[anthony1222]

Some weird piece of rock with legs that looks like a crab. Walks really slowly and only seen so far at night

 

[Kristopher Conlin]

Looks like a decorator crab? Or possibly a female pitho crab. It's hard to tell from the angle of the video and not being able to see the claws.

 

[anthony1222]

Looks like a decorator crab? Or possibly a female pitho crab. It's hard to tell from the angle of the video and not being able to see the claws.

Are either of them bad for LPS and fish? I feel bad for taking out unwanted pests

 

[PizzaIan339]

Are either of them bad for LPS and fish? I feel bad for taking out unwanted pests

I would say no to the decorator at least. It may self frag some corals to decorate himself but they mainly do that with softies. for the pithy crab I am not really sure as I know nothing about them.