Looks fake...but if its on natgeo's website, it must be real. Funny looking shark, cyclops is a good name for it 

Special thanks go to Exxon and BP for making this presentation possible.
I made a couple of calls about this now that it's out in Nat Geo. Turns out these types of deformaties have never been recorded alive at full term, and often fall victim to other pups in the womb. The assumption is this fetus had died prior to the shark being caught.
Personally, I still think the eye looks mammal. But I trust the word of those I talked to.