Need id this strange 2-legged creature

[jcardona]

Can anybody help me identify this strange looking creature I saw movin on my pico glass??

I just started this JBJ 3Gal Cubey about 3 months ago and don't want any hiccups. Thanks in advance.

 

[Bongo Shrimp]

Not legs, it's an acoel flatworm. Usually these white ones don't become a super plague but jut keep an eye on their population size. At low population size they are pretty harmless.

 

[jcardona]

When should I start getting concerned? Who do they eat or boder?

 

[Sugar Magnolia]

They eat copepods.