By Adam B. Vary
January 12, 2007 at 12:00 PM EST

You’ve probably seen advertisements for the horror flick Primeval — opening today in theaters nationwide — touting that the film is “inspired by the true story of the most prolific serial killer in history,” that this monstrous killer has taken “over 300 victims,” and that “to this day, he remains at large.” You probably wouldn’t guess, however, that this killer is, in fact, a giant crocodile.

Besides the fact that this ad campaign is just plain misleading, it irks me to no end that the marketing team for Hollywood Pictures thinks they’ll attract audiences by calling a serial killer “prolific” — like, you know, Stephen King’s prolific, or Rachael Ray. Which is not to say necessarily that the movie is bad, but since it also did not screen for critics in advance, consider this Popwatch PSA fair warning before you plunk down your money for a ticket.

Speaking of big crocs — what other movies have had deceptive ad campaigns?