ID things growing on my spiny star astrea snail

[Sidius]

Hey! I don't mean to start another boring thread about IDing something but I'm a newbie and want to know if I should get rid of this snail or not...

It has 3 different things..

Number 1 - possibly some kind of red sponge?

Number 2 - honeycomb looking thing that when zoomed in almost seems to have polyps

Number 3 - almost looks like another snail that has attached to this snail

If any of these are invasive or a pest, please let me know. I'd rather sacrifice one snail than lose a bunch or deal with pests

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