On that day, at Tunnels Beach in Kauai, Hawaii, there were
numerous turtles in the area. And Bethany was also dangling her
left arm in the water. What most likely aggravated the shark was
the watch reflecting the sun. Sharks are drawn by blood, shiny
objects, and reflections.
In Kauai Hawaii, in her book it says it was in a beach called
Tunnels. She has lived all of her life there. Read her book Soul
surfer, it answers a lot of questions.