Hammerhead Shark Shark Bites
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Transcript
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My name's Steve Backshall. | 0:00:02 | 0:00:03 | |
Self-confessed shark obsessed. | 0:00:03 | 0:00:06 | |
This is Shark Bites. | 0:00:06 | 0:00:08 | |
This time, we meet a shark with supersenses - the hammerhead. | 0:00:10 | 0:00:15 | |
With its bizarrely shaped skull, it's truly distinctive, | 0:00:15 | 0:00:19 | |
and its wide head hides a supercharged sense. | 0:00:19 | 0:00:23 | |
Like all sharks, they have a sixth sense of finely tuned | 0:00:28 | 0:00:32 | |
electroreceptors to detect their dinner. | 0:00:32 | 0:00:34 | |
But being supercharged means hammerheads discover prey | 0:00:37 | 0:00:41 | |
better than other sharks, even if it's hidden from sight. | 0:00:41 | 0:00:45 | |
But how is it able to track down food with pinpoint accuracy? | 0:00:47 | 0:00:51 | |
The warm waters in the Bahamas are the perfect place to see | 0:00:51 | 0:00:55 | |
this supershark in action. | 0:00:55 | 0:00:57 | |
And it wasn't long before one found us. | 0:01:01 | 0:01:05 | |
This is one of the most awesome creatures in the sea! | 0:01:05 | 0:01:08 | |
I don't believe it. It's a great hammerhead. | 0:01:08 | 0:01:11 | |
You can instantly see how different it is. | 0:01:12 | 0:01:16 | |
That hammer-shaped head is absolutely incredible. | 0:01:16 | 0:01:20 | |
Their wide-set eyes give them almost 360 degrees of vision, | 0:01:20 | 0:01:25 | |
helping them spot fast-moving prey like fish and squid. | 0:01:25 | 0:01:29 | |
But it's their sensitive head that sets them apart from other sharks. | 0:01:29 | 0:01:33 | |
That hammer-shaped head spreads out the electrical receptors... | 0:01:34 | 0:01:39 | |
..so that the hammerhead can sense its prey from all different angles. | 0:01:41 | 0:01:48 | |
When hunting some creatures, like rays hiding under the sand, | 0:01:48 | 0:01:52 | |
they use this extra sense to their advantage. | 0:01:52 | 0:01:55 | |
The hammerhead's remarkable head is kind of a bit like a metal detector. | 0:01:57 | 0:02:02 | |
All living things give off an electrical field. I am now. | 0:02:02 | 0:02:07 | |
The shark's head is covered in tiny electroreceptors which sense | 0:02:07 | 0:02:12 | |
these electrical fields. They're called the ampullae of Lorenzini. | 0:02:12 | 0:02:17 | |
A big great hammerhead's head could be a metre in width from eye to eye. | 0:02:17 | 0:02:22 | |
This gives them more space for those ampullae compared to other | 0:02:22 | 0:02:25 | |
species of sharks, making them much more accurate | 0:02:25 | 0:02:29 | |
at scanning the seabed for food. | 0:02:29 | 0:02:31 | |
Sweeping back and forth, they search for a signal | 0:02:33 | 0:02:38 | |
and discover their bounty like a marine metal detector. | 0:02:38 | 0:02:41 | |
The hammerhead shark, with its distinctive head, | 0:02:45 | 0:02:48 | |
pinpoint accuracy, | 0:02:48 | 0:02:50 | |
the ability to discover hidden prey. | 0:02:50 | 0:02:53 | |
This is truly a shark packed full of supersenses. | 0:02:53 | 0:02:57 |