Trace's hair and facial hair change lengths in the film, from the time he hears of Rita's death at the bar (short), to his talk with with the blonde at the cliffs (long and goatee more prominent), to when they are on the boat (short again).
Many semi-automatic pistols are shown firing. The slides of the pistols should move when they fire, but none of them do (the muzzle blasts were added in post-production).
The name on Trace's Coast Guard license is David Charles Martin, not Trace McGraw.
None of the female characters in this film are naked.
When Trace is shooting at the Dinoshark you hear the sound of a high-powered rifle, but the rifle he is shooting is an air rifle.
When Carol is calling Rita in the car, her mouth is not moving, as seen in the car's rear-view mirror.
When Carol goes to see Dr. Reeves, he shows her a computer map of unconfirmed sightings of the Dinoshark; however, when the map location reaches New Guinea, the doctor says New Zealand.
During the Dinoshark's attack on the water polo game towards the end of the film, the boom mic is visible when Carol dives into the water.