Jaws - Bites boat

Margaret de Lacey, with a hand on Thea's leg, glanced ashore. Everyone was lining the beach, waving.
She could not remember such enthusiasm in prior years, but every year the parade grew more elaborate. They were probably cheering the TV queen from Nassau, who was popular in these outlying islands, which felt themselves to be cut off.
Suddenly the banana boat hit the wake of the big Egg Harbor cruiser ahead. She could hear Thea squealing as they hobby-horsed through the waves. She turned to see that the child was hanging on.
Behind Thea, she saw a fin. From her low vantage point it looked like the Rock of Gibraltar, awash in a streaming tide. It was rushing up their wake.
Instinctively she turned her body, yanked Thea from her place, and body-slammed her athwartship between her daughter and herself.
Her last thought, as she braced to take the impact, was that she'd strained her back.
For an instant she was in a shadow, as the great white's jaws sprung open.
Then she and the last five feet of the rubber boat were crushed into a jumble of flesh and neoprene rubber as the swords of glittering ivory met and pressed.

The banana boat lay limp in the wake of the cruiser. No one ahead noticed. The children, screaming, flailed and thrashed in their life jackets.

***

Jaws: The Revenge, Part 3, Chapter 5