Continuity: When Dr. Grant first picks up the bottle of T-Rex urine it is empty, in the next shot of it there is obviously fluid inside.

Continuity: When Sam Neill opens the bag with the Raptor eggs in it, you can see the part of the bag that separates the eggs is completely intact, but in the next shot, that piece of the bag is all ripped and damaged.

Visible crew/equipment: When the group was flying into the island, there's a shot of the plane flying in front of the cloud, and there's the obvious shadow of the helicopter that filmed that shot!

Continuity: When Dr. Grant dives in the water after they're attacked, he has his watch on his right hand before he dives in, but in the rest of the shots of Sam Neill he has his watch on his left hand.

Continuity: In the scene where Dr. Grant and the others walk in on the feeding T-Rex, his mouth is slathered in blood. But when the T-Rex is battling the Spinosaurus, its mouth is clean.