Is this a type of worm?

[kenziejlooft]

Is this a type of parasite worm in my aquarium should I be worried

 

[r20crazy]

the squiggle on the snail shell (looks like poop pile) is a vermatid. pull the snail, scrape it off, reinstall snail

 

[Erick Armanii]

I have vermatid all over my tank and I hate them.. best get rid of it when u have the chance.. they cast a mucus net for feeding which can sting and bother corals.. I never had a problem with them hurting any of my sticks and some reefers will say it’s completely normal and natural.. up to you