12:09 PM PT -- Susan's husband, Harvey Swindall tells TMZ ... Susan passed away from heart attack Saturday morning. He recalls her as the most amazing person he'd ever met, adding he'll miss her very much.
Susan Backlinie, who played one of the most memorable roles in "Jaws," has died ... TMZ has learned.
The longtime actress and stuntwoman passed away at her home Saturday morning in Ventura, CA ... according to Matthew Templeton, the agent who handled her convention bookings. He says the cause of death has not been determined yet.
SB got her start in the acting world in 1975 with the role of Chrissie Watkins in Steven Spielberg's shark flick. She's the woman who goes skinny dipping in the ocean in the opening scene ... and gets savagely yanked back and forth by the shark before she's eaten.