Several times in the movie stock footage of an Orca (killer whale) is substituted for shark attacks.
A Coast Guard plane supposedly lands near the ocean labs support ship in the middle of the Bermuda triangle. However, the stock footage of the plane clearly shows coast and villages in the background.
In one scene, Linda is seen saying 'Well find out what it is, okay?' to a member of her team and then oddly repeating the same line again even after the man has walked away.