[MUSIC PLAYING]
Taking a look.
Hey, yeah, slow down, mate.
NARRATOR: A cow carcass floats ominously.
It's a really eerie feeling turning up
and there's just this one totally untouched cow.
The other has been eaten by the two white sharks,
and they're nowhere to be seen.
The disposal of cows off Headstone Bay
is something that's happened in Norfolk for decades,
and it's for practical reasons.
The people here don't want to contaminate their groundwater
by burying cows on land.
So they dispose of it at sea.
The sharks know exactly what that thing is.
And boy, do they capitalize on it.
NARRATOR: Organic animal waste has attracted deadly sharks
to Norfolk for over 150 years when
the island was a harsh penal colony and whaling port.
Now, cattle farming continues the trend.
Oh, here we go.
There is something there, 1 o'clock.
Oh, Jack, there is something quite close.
That's a big fish.
OK, now, let's get kitted up, bro.
I think the action is about to start, eh?
I'm really happy to have Kina on this trip.
He's-- he's probably the world's most experienced
white shark cage diver.
He's been through it all, on the top,
on the bottom, really hairy situations.
But he's also got a great understanding
of their behavior, their migrations, how they move,
and what areas they may be prefer.
I'm used to seeing the white sharks at the top of the table.
They're the guys that dominate.
And pretty much, we don't get any other species
getting a look in.
And it's going to be interesting to see if here in Norfolk
Island, where there's all these huge tiger
sharks, how that plays out.
Yeah, bro, ready to go.
Good.
Clear.
We've brought a shark cage because we're
going to try and put ourselves right
in the middle of the feeding frenzy under the cows.
We want to document truly unique behavior,
and to do that, we've got to get right in the mix.
Wow, spooky stuff.
Everything has vanished.
On your left, Kina.
On your left.
[MUSIC PLAYING]
Oh, look at the size of that tiger shark.
That's a big female.
That's at least 12 to 13 feet long.
Here she is right on the male now.
Watch yourself, though.
That shark is powerful.
It might be able to push that right into us, so be careful.
MAN: Yeah.
Roger.
MAN: Oh my god, that's close.
That is truly the closest I've ever
been to a feeding tiger shark.
[MUSIC PLAYING]
That just took off the entire leg,
the entire leg of that cow.
NARRATOR: Once the massive female takes her fill,
more tigers arrive at the feast.
MAN: And there we've got a 13, 14 foot
tiger followed by another one.
Look at this right here.
Some of these pushing 16 feet I would say.
MAN: Oh, I didn't even realize they got this big.
NARRATOR: Some of these tiger sharks
are nearly the same size as an adult great white.
MAN: There's so many sharks going on here.
MAN: Everything you've seen about Headstone,
I never imagined this many tiger sharks.
This is crazy.
We had a report of two white sharks hours before we arrived.
Those shadows I'm sitting out there on the periphery,
which are really, really big, could
be potential white sharks.
MAN: My thoughts are I need to get a fin camera on one
of those big tigers so when they do go out there,
we may get some insight as to what those animals
outside our vision are.
MAN: Yeah.
Roger.
Good idea, mate.
NARRATOR: Attaching a fin camera will
let Riley and Kina see if any whites are beyond their view.
Top side.
Top side, Riley.
Copy?
I'm coming out.
I'm just going to set up this fin cam real quick.
Basically, it's a spring clamp that goes on the shaft
of the dorsal fin like that.
It's super animal friendly.
It carries the GoPro that'll get imagery of the shark
as it swims around.
Eventually, this is going to dissolve,
release the spring mechanism, and this
will float to the surface.
And we can track it down wherever it is within eyesight
with this VHF acoustic tag.
[MUSIC PLAYING]
NARRATOR: It's a dangerous task.
MAN: Holy [BLEEP].
Last time I was here, I learned that yes,
tiger sharks can be calm, can be shy, can be scavengers.
But at the same time, in the flick of an eye,
they turn into a gnarly feeding frenzy predator
that you do not want to mess with.
[MUSIC PLAYING]
Watch out, Kina.
Here we go, Kina, right here.
Yes!
Yes, Kina!
It's on.
We got it on.
The fin camera is on.
Ah!
MAN: Nice work, mate.
MAN: Whoa, Kina, right behind us!
[BLEEP] That one just came straight
up there with the tents.
MAN: Third challenger goes for shore.
Telling us this is it's kill, get away from here.
They are literally coming into the cage.
Oh.
Imagine and wonder if another bigger white shark competitor
has turned up and really started to spice things
up here because everyone has gone into overdrive.
Yeah, this is getting pretty full on.
MAN: We really don't want one of these guys in the cage.
Shut that door, Kina.
Shut that door.
Try and keep that shut away from the cage.
Oh, he's got the float.
MAN: Oh, [BLEEP].
Oh, he's got the fender!
He's got the fender!
Pull the rope. Pull the rope.
The cage is going down.
MAN: Oh, [BLEEP].
[MUSIC PLAYING]