My only shark experience was seeing a 9-10' shark when my rented jet ski failed right off of Key West, which, due to its location, can get deep very quickly. My sister flew off of the back. Mercifully, the engine restarted weakly and I went over to grab her. We eventually made it back to the other side of the island and gave it back to the renter. The next day I went back out there, but she decided to stay on the beach.