Knife Fish Id Please

[fenne11y]

hay everyone.
need some help IDing this knife. was sold as a zebra knife.

what is it G.CARAPO, G.Pedanopterus or even G. TIGRE.
most pic on the web are the same for all three
i know the tanks a bit mucky at the moment.

cheers
ant

 

[Davo86]

looks to be Gymnotus pedanopterus