White worms in sump?

[CWalters]

Any idea what these are on the walls of my sump? Look like little spirals

 

[ISpeakForTheSeas]

Looks like spirorbid worms - harmless filter feeders (they’re a kind of feather duster worm known for their typically spiral-shaped tubes).

 

[Crabs McJones]

What they said ^^^

 

[CWalters]

Thanks guys! Still learning as much as I can