Corin Nemec was originally cast in the lead, but after a few days of filming was critically injured when a Belizean Coast Guard boat ran into a semi-submerged barge while transporting the crew to set. The entire right side of Nemec's body was shattered and he required multiple blood transfusions to save his life. Nemec subsequently underwent five surgeries.
At 1:08:27 the aircraft ID is shown as C-FJSM. C indicates that the plane is registered in Canada.
There is a consistent error in the English subtitles on the DVD. Every time one of the characters says "Ambergris Cay" the subtitles incorrectly show "Ambergris Key". In most of the Caribbean and Central America, "cay" is pronounced "kee" but spelled "cay".
The rocket used against the P.Rex near the end of the movie is a LAAW (Light Antitank Assault Weapon) rocket. It is a single shot, single use weapon. It cannot be picked up and fired multiple times. It also has no recoil so a person firing it cannot be knocked backwards by recoil of the rocket firing. The thrust of the rocket vents out of the open back end of the firing tube, which could seriously harm anyone standing directly behind the person using it.
Wilhelm Scream at 50:50 when P-Rex first comes onshore and eats a victim.