Detritus Worm or Planeria or ???

[JavierLW]

Can anyone guess what kind of Worm this is that's crawling on the back wall of my tank?

I am hoping it's too long to be planaria, and it seems to be round in shape.

Hopefully it's not a problem, I do suppose my 4 Assassin Snails may eat them.

http://www.playtenniswisconsin.com/Worm.html

 

[Autumnsky]

Planaria are flatworms and look flat while they slide along the glass. They have a arrow shape to the head.

 

[libertybelle]

Yeah hard to tell from the picture but planaria have very distinctive head shape. Little worms are super common in shrimp tanks if there are no predators to go after them. If you see a lot it is probably time to cut back feeding a vac your substrate.

 

[Fishlegend]

The worm may actually do more good then harm. " if it's doing fine leave it be" that's what comes to mind here.

 

[libertybelle]

I think planaria in particular can do some harm to shrimp but otherwise agreed, it’s just part of a healthy tank ecosystem. You don’t ever see them in fish containing tanks because they get eaten so they often surprise people in shrimp tanks! It’s only if the population is noticeably high that it’s a sign of a problem.