ID things growing on my spiny star astrea snail

[Sidius]

Just wanted to help clarify the third picture in my original post. That is not the astrea snail that you are looking at in the picture. That's the growth/snail like creature attached to the spiny star astrea and I'm zoomed in really close so you can see that whatever it is, it's extending that black tongue like appendage. A friend of mine suggested it could be a mollusk of some kind.

Here's a picture from further away so it's easier to see what I'm talking about...

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[smokinreefer]

Dude. You got one messed up snail.
Reminds me of the dude from total recall.

Looks like a permanently attached mini snail.