What is this stuff???

I have stuff growing on my snails. I have had feather dusters start on them before but I can't identify this. Three of my turbo snails have this and it looks like rice but tiny. I would love any insight on this and weather it is normal or not. Thanks,
Drew
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snail2.jpg
 
Thanks spanko! I actually am fascinated by all that grows in the saltwater tank. I love it! Thank you all for your support.
 
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