Continuity mistake: When the main characters first decide to go diving, they are all wearing ordinary bikinis. By the end of the film, the surviving characters are wearing diving suits.
Factual error: Like so many other films that take place underwater, this one makes the mistake of having characters who can hear each other underwater despite not wearing earpieces and having their ears exposed to the water.
Continuity mistake: Near the end of the film, the two surviving characters are banging on the bottom of the glass-bottomed tour boat. In the following exterior shot of the boat, they are several meters away from it.
