ID please ??

[polancoeddie1]

Found a couple of them in my tank..

 

[Calappidae]

Bristleworm. Never heard of tank without them.

Benefical just don't touch them or you'll get fiber glass like bristles in your finger.

 

[Betta132]

They can breed to massive numbers if you overfeed, but they're basically just spiny earthworms.

 

[Jrhunter0000]

bristle worm keep a eye on them