What is this thing?!

[Feeshrfriendsnotfood]

Was cleaning my tank and tipped a rock over to get to the glass behind it and this thing was underneath it. What is it and is it bad or part of the clean up crew?

 

[Feeshrfriendsnotfood]

Oh and it’s currently chilling in a bucket of old tank water

 

[ying yang]

Peanut worm maybe ?

 

[Eagle_Steve]

Was cleaning my tank and tipped a rock over to get to the glass behind it and this thing was underneath it. What is it and is it bad or part of the clean up crew?

On my phone and little hard to see it clearly, but looks like a peanut worm

 

[Sharkbait19]

Agree with the above
Peanut worm

These guys are harmless and will help to stir the sandbed.