Sailfish 3 m long are closing in on prey. They will only use just enough energy to make their kill. Never wasting a fin stroke. Nearly a hundred sailfish have surrounded a single school of bait fish. It's very rare to see so many of these hunters in one place. To herd their prey, the predators raise their huge dorsal fins. A mist timed strike by one sailfish could fatally damage another, but each continually changes its color from blue to striped to black. That warns its companions of its intentions and also confuses the prey. As the shaw is driven nearer the

surface, it comes within the range of the seabirds. Out here in the open ocean, there is nowhere for the bait fish to hide. sailfish live a high octane life. To survive, they must find prey daily. So, their entire existence will be spent on the move.