Mystery growth on snail shell

[magsfins]

I am starting up a nano reef tank. I was gifted a 13.5-gallon Fluval Evo and plan on stocking with a small pair of Clarkii clowns and an anemone, as well as some basic corals. I have a larger tank currently in the process of being set up that the fish will be moved to once they start to outgrow the Fluval. I finally was able to introduce a clean-up crew and noticed a few days later one of my snails has a small plant I am unaware of growing from it's shell, can anyone help me identify this growth and how I should about with treating it or removing it if its harmful?

 

[KrisReef]

Check out Acetabularia

They usually fade away, but I think I have heard of invasions? I got some once from Jamaica but they didnt persist in my system.

 

[X-37B]

Snails will aquire all sorts of algae over time. I remove most when I see it. Just scrape it off if your concerned.