Other mistake: When Jaws breaks the glass in the control room, it shatters and flies everywhere, but the water doesn't even move or give any indication of flooding the compartment.
Jaws 3-D (1983)
1 other mistake - chronological order
Directed by: Joe Alves
Starring: Dennis Quaid, Louis Gossett Jr., Lea Thompson, Bess Armstrong, Simon MacCorkindale
Factual error: When the shark swims towards the glass, it doesn't move its tail. Sharks have to swing their tail in order to swim. There is no way this shark could be moving.
Mike Brody: White sharks are dangerous. I know 'em. My father, my brother, myself. They're murders.
More trivia for Jaws 3-DMore questions & answers from Jaws 3-D
Answer: The lagoon was part of the theme park. Artificial with specific mammals inhabitants inside, warm and friendly.