What's on my snails?

[stalkem]

I have had my clean up crew from @reefcleaners for about 6 months now. I recently noticed what looked like a few spots of bubble algae on a few snails. I tried to push them off with a ling pipet... but they were a lot more firm than I was expecting them to be. I just pulled 2 of the snails out to get them off. They popped right off easy.

Question 1, is that in fact bubble algae? There is nothing else similar to that present in the tank?


While I had the snails out, I also noticed some other growths on their shells (pic below).
So Question 2, are those vermited snails growing and along for the snail ride, or are they something else?


Thanks all!

 

[Jekyl]

1 looks like bubble algae, 2 not sure.

 

[ISpeakForTheSeas]

Yes, that's bubble algae; I'm not certain on the other ones, but there's a good chance they're vermetids.

If they coil into a mound, they're vermetids.

I do see one white feather duster tube that seems partially destroyed as well.