Little white worms all over glass

[musel101]

What type of worms are these on the glass? Thanks

 

[Dan_P]

What type of worms are these on the glass? Thanks

I don’t know what these are, but my rule of thumb is most things are harmless.

 

[Fishy888]

Do they have bristles? If so they’re likely dorvilleidae worms. They grow to a max of 6 inches. They’re harmless. If anything they’re beneficial.