Jaws- Hooper's Estimate

"It's a white."
"How big?"
"I can't be sure, but big. Fifteen, twenty feet. That's some fantastic fish." He looked at Meadows. "Thanks for calling me," he said. "I could spend a whole lifetime around sharks and never see a fish like that."
Brody asked, "How much would a fish like that weigh?"
"Five or six thousand pounds."
Brody whistled. "Three tons."

-Jaws, Chapter 5