Unidentified worm

[Jarbool]

Hi does anyone know what this is? I've had my tank running for like 2 years and never seen this before. It is dead in the pictures and looks like its back end has been chewed off by my catfish. The remnants of it's body is about 1cm long for reference. Can't find anything on google but I don't exactly know what I should be searching for keywords. I got a video of it as well as this picture.
video can be found at this google link.

New video by Jaron Wiebe

photos.app.goo.gl

Edit: tank is fresh water and tropical fish live in it.

 

[Colin_T]

looks like the remains of a centipede, not a worm. It probably fell in the tank and drowned, then the fish picked at it.

 

[itiwhetu]

That is no worm, and looks terrestrial to me.