Dinoshark (2010)

Due to decades of global warming, a primaeval blood-thirsty cross between a crocodile and a pliosaur emerges from the depths of an ancient Arctic glacier. As a result, the ferocious apex predator from the past has managed to find its way in the hot waters of Puerto Vallarta, Mexico, feeding on the unsuspecting holidaymakers. Impervious to bullets, now, it's up to locals, Trace McGraw, Carol Brubaker, and the local patrol captain, Victor, to warn the town, and avert the horrific carnage. But, can they escape from the jaws of Dinocroc, the scaly killer of the ocean? Above all, who can put an end to the insatiable creature's feeding frenzy?