Anyone recognize these teeth/jaw?

Stumbled across this picture today. Allegedly this set of terribly hooked teeth was found in a can of Russian herring. While I'm not sure that I buy that story, I am immensely curious as to what sort of critter this set of chompers might have belonged too. I can't think of any fish off hand that these look like they'd belong to, but they certainly do bear a striking resemblance to the teeth in the lower jaw of a dolphin or porpoise.



http://www.bizarrefood.com/blog/canned-russian-herring/

Ah, didn't even think of Salmon, though they do make sense! Good eye, Dan! As I suspect that this is a faked image, the jaw of a fish that would be local to many Russians does make sense as an obvious choice to plop into a can of herring meat in order to produce a shocking image like this.