Strange things growing on your snails

[SeahorseKeeper]

What are the strange things that you find growing on your snails? I found sea lettuce growing on my astrea snail. I will try to take a pic the next time I see the snail.

 

[saltyphish]

mini feather

duster

 

[LetItReef]

I see tiny white spots over our 4 Nerite snails, any ideas?