Anyone who go’s in to the ocean wanting to swim with sharks. Is a tatsy treat waiting to happen. It’s like wanting to see how corny dogs are made by coating yourself with batter and jumping in to an industrial deep fryer.
The sharks that you run into on these dives are typically caribbean reef sharks ranging between 5 & 7 ft long. They are very impressive looking, but they aren't about to attack a Scuba diver on purpose unless provoked. A 6-ft tall Scuba diver all geared-up is every bit as large as 1 of these sharks. They are not going to mess with you if there is an easier meal to be had.
Exception #1: most shark attacks occur in poor visibility. Caribbean waters are usually clear with visibility ranging from 60 to 100 ft. Not much chance of being bitten.
Exception #2: Scuba divers that 'do' get bitten are usually involved in spear fishing activities. Spear fishermen are warned to suspend their catch at the end of a long leader & NOT clip them to their dive gear where sharks may be encouraged to grab.