[MUSIC PLAYING]
NARRATOR: Worldwide lockdown has
given shark expert Kina Scollay
a rare chance to track down
the legendary and elusive 747
and discover what she
and the other massive
female great whites
are doing in the waters
of southern New Zealand.
 There's less shipping,
there's less fishing boats,
and there is more
fish in the ocean.
So this could be
of our opportunity
to get down here and find
these big girls that have been
so hard to find for so long.
[MUSIC PLAYING]
NARRATOR: Large adult females
measure at least 13 feet.
To verify if
they've spotted one,
the team is using the low tech,
but effective shark ruler.
[MUSIC PLAYING]
 That's a big female, yeah?
She's moving so much quicker
than those other sharks.
 Yeah.
 Oh, here you go,
coming straight
up, straight up underneath.
[MUSIC PLAYING]
[MEN SHOUTING]
 The water's so clear.
I just say her
coming straight up.
 I mean, we know around
tiger sharks seabirds
are a part of their
diet, but great
whites occasionally as well.
 Nice [INAUDIBLE]
had that acoustic tag.
 That's fantastic.
That means we'll be able to
get a growth estimate on it.
Happy scientists.
 Happy scientists.
I mean, this is the type
of science in the field
that even I get excited
about [INAUDIBLE]..
NARRATOR: The tag, placed
by Australian divers,
means this shark has
been measured before.
Data from this experiment will
help scientists understand how
fast the large females grow.
 Let's have a look at the shark
ruler here, got the video here.
Just line it up.
KINA SCOLLAY: So cool.
MAN: Oh, this is great.
 So I'm going to
try to get her as
straight as possible,
think we could
take it right about like that.
Draw a little line here snout
to tail, as you can see--
 She has--
 3.85.
 3.85.
Well, that's a big animal.
 Not bad.
And I've found out from
the Australian colleagues
that this animal's grown
at least 45 centimeters
in the last three years.
NARRATOR: At 3.85 meters, the
tagged female measures in just
under 13 feet, a big fish but
not nearly this size the team
is looking for.
[MUSIC PLAYING]
