Some type of flat worm? Or mutated ?

[OrthoVet05]

Found this larger flat worm looking creature. Pretty wild. Any Id?

 

[KJ]

Ghost Flatworms (Amphiscolops)

 

[cloak]

Harmless flatworm, although I wouldn't want a flatworm of any type in my tank. That honeymoon is over.

http://www.melevsreef.com/articles/how-to-eliminate-flatworms-red-planaria