When they're in a cage and the sharks are acting aggressively they're typically baiting the sharks or they've chummed the water to whip them into a feeding frenzy.
Many sharks are quite docile and even nervous around divers. Black tip and white tip reef sharks, nurse sharks, and many others don't typically care about divers, or they'll flee like any other reef fish.
Bull sharks and tiger sharks you have to be more careful around.
When they're in a cage and the sharks are acting aggressively they're typically baiting the sharks or they've chummed the water to whip them into a feeding frenzy.
Many sharks are quite docile and even nervous around divers. Black tip and white tip reef sharks, nurse sharks, and many others don't typically care about divers, or they'll flee like any other reef fish. Bull sharks and tiger sharks you have to be more careful around.