Reef*

They don’t inhabit the waters of the keys often, but you are correct at times they have been spotted passing through as they migrate.

Theyve always been there. But since conservationists have gotten laws passed to prevent fishing for sharks, their populations have exploded. If there are more sharks, you're naturally going to see more of them. You can see pretty much any species anywhere. Even during migrations, they stop to hunt and everything along the way. Great Whites have even been observed off the coast of Texas.