I think it's a longstanding debate as to the proper name for that fish. I've heard locals call them "pampano" but they're definitely Leatherjacks/Longjaw Leatherjacks or relatives thereof. I'm not a biologist so I'm not sure if slight differentiations in coloring would warrant a completely separate species.
http://www.mexfish.com/mexico/leatherjack/
*Edit: Note that even in the Mexfish description it lists:
"The Longjaw Leatherjack,
Oligoplites altus, whose common Spanish name is “Piña Bocona”, is a member of the
Jack or Carangidae Family, known collectively as “Jureles and Pámpanos” in Mexico."
Hence the confusion