the surface for activity. and after several hours at sea, they strike it lucky. the cape gannets are there already. this is what's known as a bait ball, a group of sardines that predators have cut off from the main shoal. sardines are always looking for depth, for protection, so they're trying to go down deep and that's where the sharks come in. the sharks are at the bottom, stopping them from going down. so, you have the sharks at the bottom, you've got the dolphins around the edges. and you can see how those dolphins... you see how they're jumping around like that? they're basically stopping the sardines from running away. and then one of the most menacing of guests arrives. stealthy, deadly, a large dusky sharkjoins the frenzy. the bait ball is decimated in minutes, to thejoy of the watching tourists. it was great! it was amazing! best time ever! if you haven't had that, you're not living. -