A shark is attracted to the exact kind of splashing and activity that occurs whenever human beings swim. You cannot avoid it.
8 seconds sound clip from the Jaws (1975) movie soundboard.
You can hear this line at 00:50:46 in the Blu-ray version of the movie.
Quote context
[...]
- And there's no limit to what he's gonna do.
- I mean, we've already had three incidents. Two people killed inside of a week.
- And it's gonna happen again. It happened before.
- The Jersey beach, 1916. Five people were killed... In one week.
- Tell him about the swimmers.
- Opening the beaches on the Fourth of July is like ringing the dinner bell for chrissakes!
- I pulled a tooth the size of a shot glass out of the wrecked hull of a boat out there.
- And it was the tooth of a great white.
- It was Ben Gardner's boat, it was all chewed up.
[...]