Live Rock "burping"

[superh]

Sometimes something that is inside my LR will send up a small cloud of dust, almost like it is burping. Any ideas on what's going on?

 

[dburr]

Their must be some type of animal in there cleaning house. Maybe a worm? A crab you didn't know you have? :notsure:

 

[moatdaddy]

i had small anenomes comeout of the holes about an hour after, but ya its definitly an animal/critter of somesort