What are these? worms?

[Ryanwoodz]

I noticed last night my substate has a few very small worms. The are about 1 mm long, very thin and brown in color. What are they and are they a bad thing???

 

[Grins]

Most worms in a SW tank aren't bad so I'd not worry too much. I've not seen thin brown ones before so not sure what they could be without a photo.

 

[Charlesr1958]

As Grins said, without a photo theres not much point in trying to ID it by descriptions, so many species to pick from. As such, might you find a family group that yours fits within my hitch hiker pages.

Chuck