[SPLASH]
NARRATOR: With the sharks being
monitored on the ocean floor,
Jeff and Chris decide to try
and identify the white sharks
at the surface--
so they're going fishing.
They ditched the big boat for
a smaller, more agile dinghy.
 My advice would be,
you'll need a bigger boat.
I don't know where
I got that from.
I think I heard
that from somewhere.
Getting in the small boat
allows us to get nice close-up
up photos of the dorsal fin--
which is a great way
to identify Fred.
NARRATOR: The dorsal
fin's main purpose
is to stabilize the
animal against rolling,
and to assist in sudden turns.
But it can also play a major
role in identification.
Just like a human fingerprint,
no two dorsal fins
are the same.
CHRIS FALLOWS: If we compare
any photos that we take today
to those images I shot
in 2014, the Fred's fin,
which is perfectly
straight, we should
be able to get a positive ID.
NARRATOR: Tapping on the
boat sends vibrations
through the water that are
received by the sharks'
lateralis system--
a network of
fluid-filled vessels
that run along the shark's body
designed to detect the movement
of struggling prey.
JEFF KURR: Anything?
CHRIS FALLOWS: He wanted to
come closer, but there's a part
of you that doesn't.
Oh!
Oh, man, look at that!
JEFF KURR: That's a
nice dorsal right there.
CHRIS FALLOWS: It's
amazing-- with a small boat,
they obviously feel so much
less threatened, you know?
It's coming back.
It's coming straight at you.
Turn-- pan left.
JEFF KURR: He wants that camera.
CHRIS FALLOWS:
That is incredible!
JEFF KURR: He
wanted that camera.
CHRIS FALLOWS: He's
going to come back again.
JEFF KURR: Come
right under the boat.
CHRIS FALLOWS: Whoa!
A-ho!
That is amazing.
That shark is bigger
than the boat.
Not too many times in your life
where you can say the shark
is bigger than the boat.
Oh, man!
NARRATOR: One after another,
these curious beasts
come up from the depths to
say hello to Chris and Jeff.
CHRIS FALLOWS: Aw, whoa!
NARRATOR: The size
and aggressive nature
of these sharks is remarkable.
But one by one, the team
can verify that none of them
are in fact Fred.
CHRIS FALLOWS: The
great white shark
is the drug of the ocean--
once you've had one,
you can never get enough.
Whoa!
[LAUGHS]
[MUSIC PLAYING]
