I don’t remember their name

[Shawn_epicurious]

I have been told in the past what the name of these little creatures growing on the back wall of my tank. The ones in this pic are near the bottom, under a caved in my scape. So, I can’t really clean them off. I have been told they are beneficial as part of my cleanup crew.

I just wanted to do some research on them, but... I can’t remember the name.

 

[vetteguy53081]

Spirobid worms

 

[Shawn_epicurious]

Spirobid worms

Thank you!