The Deadly Fish That Changes Colour to Hunt | 20 Years of Planet Earth | BBC Earth

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0:08Sailfish 3 m long are closing in on

0:12prey.

0:18They will only use just enough energy to

0:22make their kill. Never wasting a fin

0:25stroke.

0:30Nearly a hundred sailfish have

0:32surrounded a single school of bait fish.

0:35It's very rare to see so many of these

0:37hunters in one place.

0:42To herd their prey, the predators raise

0:45their huge dorsal fins.

1:05A mist timed strike by one sailfish

1:08could fatally damage another, but each

1:10continually changes its color from blue

1:13to striped to black. That warns its

1:16companions of its intentions and also

1:19confuses the prey.

1:23As the shaw is driven nearer the

1:25surface, it comes within the range of

1:28the seabirds.

1:44Out here in the open ocean, there is

1:46nowhere for the bait fish to hide.

2:12Heat. Heat.

2:31sailfish live a high octane life. To

2:36survive, they must find prey daily.

2:39So, their entire existence will be spent

2:42on the move.

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