FAQ

With only 48 hours to produce results or lose their funding in their search for a cure to Alzheimer's disease using neuro-stimulating proteins from genetically-enlarged shark brains, medical biologists Susan McCallister (Saffron Burrows) and Jim Whitlock (Stellan Skarsgård) along with their weekend skeleton crew—marine biologist Janice Higgins (Jacqueline McKenzie), engineer Tom Scoggins (Michael Rapaport), shark expert Carter Blake (Thomas Jane), meteorologist Brenda Kerns (Aida Turturro), and chef Sherman "Preacher" Dudley (LL Cool J)—receive lead investor Russell Franklin (Samuel L. Jackson) at Aquatica, their offshore research facility, for a demonstration. The demonstration proves successful, but they discover that enlarging the sharks' brains has also increased their intelligence and, with a storm approaching, the sharks take this opportunity to fight back.

Deep Blue Sea is based on a script by screenwriters Duncan Kennedy, Donna Powers, and Wayne Powers.

It's never outright stated. However, since the shark didn't go through the titanium fence and Scoggins swears that he locked the gates, Carter concludes that the shark jumped over the fence, which is why he has Scoggs raise the fences.

Susan was wearing a rubber wet suit and thought that standing on it out of the water would provide her with sufficient insulation so that she too wasn't electrocuted.

The original ending of the movie had Susan McCallister surviving as well as being the one to kill the shark. However, during the test screenings, it was noted that the audience did not warm to her character, so it was decided to change the ending into one where Susan was eaten by a shark in a sort of Frankenstein-killed-by-the-monster scenario. So far, the original ending is not available as an alternate ending on any of the DVDs.