favia has ate a snail or crab?

[boostd2valve]

I noticed my favia looking weird..looked like one of the mouths was turning into a black hole..well later tonight i can see its either a nas snail or one of my small hermit shells jammed in there. Has anyone ever seen this before? Im guessing it was on there trying to get food that was laying on him!

 

[boostd2valve]

 

[schroder_reef]

I haven't seen them take a shelled animal, but I'm sure he will spit the shell out when finished digesting the meat. I wouldn't worry about it.