What the hell is it?

[SimonV12]

Hi, tonight i have found this thing swimming in the water column, high close to the top of the tank. It was wiggling very fast to swim with sides. About 2 cm long and approx 5 mm thick with slightely larger top - Eel head like.
Any ideas what is it?

Thx
S

 

[philosophile]

Larval bristleworm probably

 

[SimonV12]

Thx

 

[rssjsb]

Yeah, google "epitoke" and see if it's what you've got.