Any ideas on this small reddish growth on rock?

[neznarf]

I’m having trouble IDing this online. This is the only one that I can see in the tank. It doesn’t always have that stringy part coming out of it, but it comes and goes. Any ideas?? Thanks in advance.

 

[Idoc]

Looks like a vermatid snail extending a mucus screen attempting to catch food.

 

[neznarf]

Looks like a vermatid snail extending a mucus screen attempting to catch food.

Thank you!