Help identify

Curtis

Good day to everyone. I'm writing in this section because I suspect this is some kind of invertebrate. Can anyone tell me what it might be? Some of these spirals are already starting to unfurl and sway with the current. Best regards, Denis.

Daniel

This is a fan worm, its tube is calcified, and it is unlikely to straighten out.

Theresa

Is it a problem that there are many of them? I scrape them off the front windshield, but I don't touch the side and rear ones.

Dennis

It's nothing, these are filters that help keep the water clean.

Jason

Here is a photo of an unfurled worm.

Matthew

I think he hasn't had time to wrap up yet) they are building the house in a spiral.