Is this aptaisia? If not, what?

[DothanReefer]

so I found this on the shell of an astarea spiny star snail I received from WWC a couple weeks ago. I first saw them about a week ago so I pulled the shell out and scrbbed it off. Now, I see they are back on the shell. What is this!? Good or bad???

 

[alysak6075]

Yep thats an aiptasia, pull it out, throw it out, but i think it might be too late its probably multiplied at this point. bummer.

 

[DothanReefer]

Thanks for letting me know.

M-****!!!!!!