River Monsters (2009–2017): Season 4, Episode 2 - Pack of Teeth - full transcript

In southern Africa, there
are rumors of a deadly fish.

It lurks unseen in the eerie
waters of the Okavango Delta.

There are large animals
under the water

making these really shake.

A killer with shark like teeth.

There are stories of
it hunting in packs...

They are killing machines.

Feeding in frenzies on
schooling fish...

This is just incredible.

And even on drowning humans.

It's the most brutal thing
you'll ever witness.



It sounds like the work of
giant South American piranhas.

But there's nothing like that
here in Africa.

Or is there?

My name is Jeremy Wade.

Fish on!

My mission is to enter this
mysterious world to track down

and catch this
murderous river monster.

I recently heard a story about a
small ferry that overturned on a

river in southern Africa.

The boat was old and overloaded
with cargo and passengers.

When it started taking in water,
the children panicked...

and the boat flipped.

Apparently, there were no
survivors...

and rumors circulated that the
victims didn't just drown.



They were attacked.

When the bodies were recovered,

they were found to
be partially eaten.

People at the time said that the
victims had been eaten by fish.

Official accounts, however, said
it couldn't have been fish.

Larger predators must have been
responsible.

Crocodiles and other killers
live here in abundance,

but the locals are convinced
that the size and number of bite

marks couldn't have been the
work of these usual suspects.

So could those original accounts
have been correct?

Could there be a pack-hunting
fish, similar to a piranha,

living in southern Africa?

It sounds hard to believe, but
I've heard equally fantastical

stories in the past that have
turned out to be true.

Like a man swallowed
whole by a giant fish...

a bus crash where passengers
were devoured by piranhas...

and fishermen having
their genitals mutilated

by an underwater hunter.

Aah!

So even though I've caught my
share of monsters in Africa,

I've never come across a
piranha-style killer.

But I have learnt that
fishermen's tales

shouldn't be ignored.

So I'm off to investigate a
river system that's said to be

the home of this killer, to see
if I can figure out what it is

and then catch it.

But I've never been in this
region before,

so I'm not sure what to expect.

I'm at the Okavango Delta in
southern Africa, where I'm

hoping to come face-to-face with
the river monster that mutilated

the people on that ferry.

This place is known as
the Jewel of the Kalahari.

It's a miraculous oasis of life
in the midst

of one of the world's
harshest deserts.

Each year, the rains in Angola
flow down through Namibia,

eventually flooding nearly
6,000 square miles of land with

over 380 billion
cubic feet of water,

creating the Okavango Delta.

Over a period of months, it
slowly recedes.

But the water that remains
attracts life for miles around.

It's also the focus
of human activity.

And where humans and
animals are forced together,

conflict is inevitable.

Out on the water
for the first time,

it's unfamiliar territory to me.

A claustrophobic labyrinth of
channels,

I could easily lose
my way around here.

I begin my investigation by
trying to connect

with the locals to find
out what they know

about the river's
dangerous occupants.

I stop to chat with a group of
reed collectors, and they

mention a familiar
selection of suspects.

So, it's the crocodiles and
hippopotamuses in the water?

Yeah, they're here.

Yeah, yeah.

This is really... you know, it's
the same story.

You go in lots of other parts of
Africa, the water is dangerous.

And the thing you just
hear over and over again,

it's crocodiles, hippopotamuses.

As these two killers are
so brutal and visible,

people just assume they
are the culprits

in every unexplained
death on the water.

But I think it's possible there
is a pack-hunting killer fish

down there, responsible for some
of these brutal deaths,

including the ferry victims.

I hook up with some fishermen to
see what they're catching.

It's very clear this is a very
rich water.

Lots of these things in here...
Tilapia.

This is the staple food source
for sub-Saharan Africa in terms

of fish, and there are lots of
them.

They're nice fish, but...
Nice-looking fish

but also very tasty.

But I think I can bet that
there's not any people that are

going to be enjoying these.

There's going to be other fish
in here, as well, with teeth,

feeding on these.

This water is bound to have
predators in.

I ask around if there's anything
that fits the description

of the toothy pack hunter.

And one of the stories I hear is
of a young man who was attacked

while wearing a crucifix
around his neck.

A predator in the water spotted
the moving, shining object...

and went for it.

Apparently, the man's chest
was sliced open.

The locals believe it was the
jaws of a predatory fish

that inflicted the damage.

I'm told there's an
English-speaking fisherman named

Clifford who may have more
information, as he, too,

was bitten by a fish
in these waters.

The fish we got, I tried to
grab the fish, but I hit it in

the tip with my hand, and it
closed down.

And is this the mark here?

Yes.

Wow.

I had 14 stitches.

My thumb is no longer
functioning.

So, what is the name of this
fish that bit you?

Ungwesh.

Ungwesh? Um...

This is the thing
with fish names.

The reason we have scientific
names is that everybody knows

what everybody is talking about.

This is not a name
I've heard before.

It's clearly a predator.

It's toothy.

I'm actually quite used to
seeing piranha bites on

fishermen in the Amazon, and
you're normally talking there

something small... something
maybe, at the most,

an inch across.

This is, we're talking,
2 1/2, 3 inches across, and it's

got a sort of... almost a sort
of a triangular profile.

But to inflict a wound like
that, it's got to have very,

very sharp teeth.

This is a couple of years ago,
and it's just left

a permanent scar.

Can you describe the
fish that did this?

What does it look like?

What is the mouth like?

What is the body like?

It's a long fish
with sharp teeth...

and it's got stripes.

The teeth, they are close.

They interlock?

Are there a lot of them in
the water here?

Is it something
you see very much?

During the month of January,
February, the water is clear.

You see schools of them...
Lots of them.

So, the picture that's emerging,

it's not a solitary hunter.

This is something
that lives in packs.

Clifford described the
way the teeth work.

They interlock,
that's quite piranha like.

The fact that they're in packs,
that's also quite piranha like.

But this is the wrong continent.

And to my knowledge, there's
nothing piranha like in Africa.

But this actually sounds
something very similar,

but possibly something
even more dramatic,

because the fish are bigger.

The individuals can inflict
more vicious wounds.

If this ungwesh is a toothy,
piranha-style pack killer, then

it could be the monster at the
heart of that ferry incident.

I need to figure out what it is,

and to do that, I
need to catch one.

I'm after a predator...
A meat-eater.

So I've got a piece of steak
here, quite bloody...

The kind of thing that
piranhas would tear to shreds.

So, quite a big hook.

And because what I'm after has
probably got teeth, I'm not

using just line
next to the hook,

'cause that would just
be sliced through.

This is wire.

This is like 80-, 90-pound
breaking-strain wire.

Within seconds of my
bait hitting the water,

it's getting some interest.

Yeah!

Oh!

Could I already have hooked the
river monster of the Okavango?

Fish on!

This is a strong fish.

A meat-eater has taken my bait,
and it's putting up a fight.

Glimpse of that,
glimpse of that.

I think it's a some
kind of catfish.

Wow.

Aah!

It's clamping down,
it's clamping down.

It's a sharp tooth catfish, and
it's got some powerful jaws.

Ah.

That's the hook
out, which is nice.

So, this is a very voracious,
meat-eating predator.

There are teeth in there.

He drew blood on my hands.

But they are...
They're small teeth.

These could certainly make short
work of a human corpse.

But the... the look of that
corpse, it would be very

different from a body
that's been bitten.

So this is actually
not what I'm after.

And that's quite a thought.

There's something else down
here which is even more

fearsome than this.

I head back to the village.

I need some more local knowledge
if I'm going to get

to the bottom of this mystery.

People tell me the
ungwesh is difficult

and dangerous to catch.

But, once again, it's the large,
visible predators

they talk about most.

And when you see injuries like
these, you can understand why.

Can you tell me what it was
that happened to you?

So, these are... injuries
caused by crocodiles.

Both mother and daughter
were in the water,

collecting water-lily bulbs.

A crocodile under
the water, unseen,

grabbed the
daughter's left hand.

Daughter obviously cries out.

Mother comes to help.

And as she attacked the
crocodile with the sickle,

the crocodile let go of the
daughter and then went

after the mother.

The crocodile actually
had the mother's arm...

and was feeding on this.

Then, the mother was able to,
with her remaining arm, gather

her daughter and take her where
they were safe.

I have to say that hearing how
dangerous crocodiles are is one

thing, but actually seeing the
evidence really underlines,

for me, just how potentially
dangerous these waters are.

But the villagers believe there
is a man here who can help

protect them...
The witch doctor.

He doesn't look as I expected,
but I'm told he's a very

powerful healer with an
extensive knowledge of the fish

in these waters, as some of them
have dark powers

that affect his medicine.

He's listed four fish...
Something called the buckibitu,

nairu, tuni, which I think is
also known as the barbel

or the catfish, and
then, here again,

is this fish called the ungwesh.

So, do different fish have
different powers?

So, the ungwesh is the
most powerful fish.

If he has eaten the ungwesh, he
says, the illness will multiply.

It will become much stronger
than it was in the first place.

And for this reason,
he doesn't eat ungwesh.

He doesn't even touch it.

He doesn't even allow
it inside his compound.

I know you don't touch them.

But is there any fisherman in
the village... anybody here...

Who could show me one?

Okay.

So, he says his daughter...
Not in here, but if I go outside

his daughter has got something
that she can show me.

His daughter brings me what she
calls the ungwesh,

but it's not quite
what I was hoping for.

So, these are the
teeth of the ungwesh?

I'll tell you what
struck me, first of all.

It wasn't as much this.

It was his reaction.

He visibly backed away.

It's not just talk.

These are definitely
powerful in his belief.

Didn't want to be
anywhere near them.

They look almost shark like,
these teeth.

They've sort of crumbled a
little bit, but I can tell that

they are very, very sharp.

But I'm still no nearer
visualizing what the entire

creature is like.

It's a tangible clue, though.

And that evening, as I watch
the villagers prepare

for a blessing ceremony,
I feel I'm getting closer

to revealing its identity.

When the witch doctor reappears,
unrecognizable in his ceremonial

attire, I realize I'm a long way
from understanding this place.

He seems to exist on the cusp of
another world.

And within minutes, he's worked
the women into a frenzy.

Talk about a transformation.

The serious man I was talking to
and then, just suddenly,

this dancing ball of energy.

Incredible.

The witch doctor's
transformation is not the only

surprise of the evening.

The ladies bring out their
baskets, which they use for

fishing in the shallows.

But they also ask me to bring
out my fishing rod.

Do I sit here?

Okay.

Suddenly, I'm at the
center of their ritual.

The women are actually getting
their fishing baskets blessed.

And I've sort of been snuck into
their number, maybe to give me a

little bit of protection, good
fortune in my quest to find out

about this fish, the ungwesh.

They seem to feel that if I'm
going after the ungwesh,

that I'm going to need
all the help I can get.

Then, as quickly as it
started, the ceremony ends.

The next morning, I go with
the women, basket fishing.

I find it's often by integrating
yourself within the community

that the best
information comes out.

While I'm doing this, looking
for fish, concentrating on

what's in the basket, I'm very
aware that around me,

you've got water lilies.

And this is exactly what the
mother and daughter were

collecting when they were
attacked by the crocodile.

Oh, yeah, yeah, yeah, yeah!

Yeah, yeah.

I have two... I have two fish.

Two fish.

- Two fish?
- Yeah.

That's a river monster.

The ladies scare the
fish out of the weeds.

But instead of escaping into
open water,

there are baskets
waiting for them.

I have to say, it's very nice to
get back to the basics of

fishing, and you're talking
about just simple materials

and a bit of human
cooperation and ingenuity.

And there we are.

There's the fish.

Uh, where do I... aah! Aah!

Oh, it nearly got away.

Nearly got away.

So, in the... in the buckets?

Yes.

That's actually an
impressive catch.

They're not big, but
there are lots of them.

Lots of fish.

But the women are saying that
sometimes around here,

it's possible to find large
concentrations of big fish...

Very big fish.

They say that doesn't happen
very often.

It's hard to find, but the way
that I can find that is to look

for the birds.

The birds... the water birds...
Will tell me where they are.

This is what I was hoping for...
A little piece of inside

information which could lead me
to the killer fish

that prowl these waters.

So I head out, scanning the
horizon for birds.

And after a few hours, I find
what I'm looking for.

There seems to be some
excitement.

Some of the birds seem to be
quite excited

behind these reeds here.

So we're just gonna see if we
can go around into this bit of a

backwater and just see
what's causing that.

These must be the water birds
that the ladies spoke of,

but I can't quite get
to where they are.

Very frustrating.

You can't see what's going on,
but every now and gain,

there's a loud, sort of
slapping, hopping sound.

And, uh, I think there's
something very dramatic going on

under the water, but I just
can't get to it.

I try to force my way into the
reeds to see if I can glimpse

what's causing this commotion.

Bubbles in the water.

These reeds are shaking.

Some quite large animals under
the water making

these reeds really shake.

Some of these lilies shaking,

and there's a few
leftover birds.

But there's a sense that the
action has just moved on.

It's very frustrating.

I got to the edge of it.

I saw the shaking weeds.

I couldn't really see what was
responsible,

but there's something
under the water.

It just appeared like a large
collection of predatory

creatures in the water.

But they moved.

They're very elusive, very
mysterious, very frustrating.

I really want to get to the
bottom of this.

Unfortunately, the reeds are too
dense to follow the action.

Then, I realize I'm not alone.

So, there's people in here,
as well.

They obviously know what's going
on or certainly have

a better idea than I do.

She's just disappeared in a very
thin channel there

between the weeds.

I don't think there's any way,
in this, I'm gonna go after.

But...

some sort of secret things going
on here that I would really like

to know more about.

The next day, I'm privileged to
join a 71-year-old village

elder named Duba.

He's spent his life
on these waters.

I'm hoping he can help me unlock
the secrets of this reed-filled

labyrinth and find the killer
fish at its heart.

Duba is one of the last
Sand River bushmen...

Some of the most
ancient people on earth.

They have fished these eerie
backwaters for thousands,

if not tens of thousands, of
years and own the traditional

fishing rights, so it's only
with Duba's permission

that I'm allowed to be here.

And without his help, I would
never find my way out.

Duba, can you tell me what's
different about this place?

What happens here?

So, the significance
of this place is that,

traditionally, this is
where the dead were taken...

and they were buried up to
their necks.

The rains would come.

The rains would then go away,
and the body would be gone.

And the people would be
transformed into papyrus plants.

They believe these floating
spirit papyrus protect

the lagoons, moving
independently

against the current
to close the channels

and trap intruders
inside the labyrinth.

So, if you come here
without permission,

what happens is that
either you're going to find

the way into the lagoon
blocked by papyrus...

You can't get in, you're
physically kept out.

If you insist on pushing your
way through, the papyrus will

close behind you, and you'll
never find your way out.

All that will be found
eventually

is just your empty canoe.

Duba, I've been hearing about a
fish called the ungwesh.

Is this a particularly
dangerous fish?

The ungwesh is a fish that
is... it's very toothy.

It's got teeth a bit like a
crocodile... very sharp.

From my point of view, fishing
for them, trying to find them,

I've established that this place
is a sacred place,

a haunted place, if you like.

But what that also means is,
it's got a degree of protection.

People don't normally come here.

So I think, while I'm here and
while I'm sort of authorized to

be here, I could do a lot worse
than just put a lure through

the water and see if there is
anything down there.

In this lagoon, I'm trying
a small fishing lure.

If the ungwesh is a pack hunter
like the piranha, then a

disturbance near the surface is
what it might go for.

There's a fish, fish, fish,
fish, fish.

Whoa.

This fish took almost under
the... oops...

Under the rod tip... an
indication of how voracious

the fish are in this water.

I mean, I've got about
4 feet of line there.

I was just about to lift it out
of the water, and it grabbed it.

And I'm just letting
it tire out a bit.

I mean, the chances are it's got
teeth if it went for that spoon.

So, I've got bare feet in here.

I want it a little bit tired
before I try

and swing it in the boat.

Ay.

Beautiful little fish.

Very toothy.

This is actually
an African pike.

Sort of mottled green.

The color is actually
wrong, I think,

for what I've been
hearing about.

But if I just compare the teeth
with what I was given by the

witch doctor, actually the teeth
are very different.

Very different.

So, I mean, they're quite a nice
toothy fish to catch this, but I

think we can rule this
off the suspects list.

So the hunt for the mutilator
of the ferry victims continues.

Nice-looking fish, but it's not
the one I'm after.

I'm working my way through the
food chain, but nothing yet

matches the description
of the ungwesh.

As we near the lagoon's exit,
I spot something unusual

in the water.

There's an old canoe
here, just upturned

by the side of the canal.

I've been hearing all these
stories about how this is not a

good place to come to if you
don't have permission.

I have to admit, it is
quite a spooky place.

It's quite easy to
dismiss those stories.

And then we come across a
canoe with no occupant.

Just adds to that general
air of spookiness.

You wonder what happened to
the owner of this canoe.

With my suspect list narrowing,
I head out again into the main

channel, keeping my eye
out for flocks of birds.

I decide to target a different
part of the water column as

I systematically zero in
on the mystery fish

locals call the ungwesh.

This is quite a weighted, heavy
lure... heavy head to it, there.

The idea of this is, it goes
down to the bottom, which tends

to be where the larger fish
might be lying.

It's got a very enticing, sort
of wiggly action.

And it's just the kind of thing
that's going to entice

a predatory strike.

Let it hit the water and let it
sink down maybe 8 or 10 feet.

And then just twitch it.

Oh! That was something.

Twitch. Twitch.

It's got these trailing sort of
tendrils, and it's got this

rubbery body and a little
rattle, as well.

I think, if you're a predator,
you see a movement,

you bite first and you
ask questions later.

All right, let it sink.

Sink, sink, sink.

Twitch.

Twitch.

Twitch.

Twitch.

Oh, I thought I felt
something there.

And twitch.

And again.

Oh!

Twitch.

Oh!

Oh! Yeah! Yeah, yeah!

Hey!

Wow.

Oh, look at that!

Look at that!

He got about 4 feet
out of the water.

The line's sounding
like it's in pain.

It's slicing the water.

Could it be the ungwesh...

Long, silvery,
horizontal stripes.

The pack-hunting killer fish
I've been searching for?

Ah.

I think this might actually be
the ungwesh,

from everything I've heard.

Definitely fits the description.

Sort of streamlined fish.

Silvery color, horizontal black
stripes, and unmistakable,

large, sharp,
interlocking teeth.

And, well, I actually recognize
this as a tigerfish.

This definitely looks like it's
been doing a bit of hunting.

That body, although elongated,
is quite... you know,

it's very full.

It's been feeding.

And then those teeth... I mean,
that is... yeah, that is

the tooth the witch doctor
showed me.

I think we've got a positive
ID now on this fish now,

for sure.

So, I've matched the teeth from
the witch doctor

and identified the ungwesh.

But is it really a fish that
attacks in frenzied packs

like the piranha?

I've caught a tigerfish
before...

The goliath tigerfish
- at the Congo.

There we go.

That fish has the size
to be a killer...

What a freshwater
monster this thing is.

But it works alone.

The one I'm after hunts in packs
and can potentially bring down

several large targets at once.

The type of tigerfish I just
caught is a relative of the

piranha, but it can grow to over
3 feet long, and its average

weight is more than 10 times
that of a red-bellied piranha.

So, imagine hordes of these
tearing at your flesh.

A voracious pack of teeth that,

if my hunch is right, could
easily have disposed

of the ferry victims.

To find out more about this type
of tigerfish, I meet up with a

man who has years of experience
catching them... a fishing guide

named Yuri Janssen.

People talk a lot about
tigerfish being very aggressive.

How dangerous do you think they
are to people in this river?

The potential is that we're
dealing with a species that is,

without a doubt, the most
aggressive freshwater species

in Africa and
possibly worldwide.

It's just such an
aggressive fish...

particularly during the feeding
frenzies associated with the

catfish run, when tigers get
together and shoal and actually

feed as a unit rather than
individually.

This sounds like the lead I'm
after... a spectacular

phenomenon that occurs at one
specific time of the year here

in the delta that Yuri believes
incites the tigerfish

to hunt in packs.

It's called the catfish or
barbel run, and this occurs when

thousands of catfish prey on
millions of baitfish.

This hunt, in turn, attracts
packs of tigerfish to feed in a

predatory frenzy.

Maybe this is what was
happening in the reeds.

As soon as that noise starts,
the tigers are there in seconds.

They go into a feeding frenzy
with that mouth open,

and they just chomp.

You see it's a fish being
thrown up in the air.

It's the most brutal thing
you'll ever witness

from a freshwater species.

Tigers naturally are attracted
to any activity, whether it be a

struggling animal or a
struggling human being.

Do you have any... have you
heard any specific stories

that illustrate that?

There is one that stands out,
at one particular incident,

in a river in South Africa.

At the height of summer, an
off-duty game ranger decided to

take a quick dip in
the river to cool off.

A risky decision, even if he
thought the area was croc-free.

But crocodiles are not the only
predators in this water.

He was brutally mauled all
around the groin area.

The nature of the wound
suggested it was

a large tigerfish.

Aah! Oh!

He almost bled to death.

Oh! Oh!

That just shows the ferocity
of the tigerfish.

Attracted to any kind of
movement in water, and attacking

things that may not resemble
their prey.

So, another example of a
tigerfish attacking a human

in open water.

But it's still hunting alone.

However, these accounts of them
feeding in frenzies during

the catfish run could
be the proof I need

that they do work in packs.

The next morning, I head
deeper into the delta,

scanning the water for the bird
activity that could be the sign

of tigerfish on the prowl.

But finding a run is not proving
to be that easy.

It's a natural phenomenon that
can appear and then disappear

back into the reeds with no
apparent warning.

As I'm not finding anything at
water level, I decide to search

for the predatory
fish from above.

Looking down on the maze of the
Okavango, I realize that I'm

finally beginning to
unlock its secrets.

What I'm looking for is
concentrations of birds,

because people have told me that
is where the predators

are going to be.

Flocks of birds typically feed
on the baitfish

that trigger the run.

I'm counting on them to
lead me to the action.

Yes, I can see them.

I can see the birds.

That is where I'm
going to put my line.

My hope is that, like the birds,
packs of tigerfish will be going

after the barbel-catfish run.

This will prove my theory that
these toothy killers do hunt

together and could be capable of
mutilating a boatload of people.

Well, here are the birds, but
they're not actually doing

anything at the moment.

It's like they're waiting for
something.

It's like they can sense
something that I can't.

It's actually quite spooky.

Something is going to happen.

It's not happening yet.

Then, seemingly out of nowhere,
the catfish start arriving.

An army of them schooling
together to herd thousands of

baitfish out of the reeds, into
open water, where the catfish

can feed on them.

This is the rare freshwater
spectacle I've been hearing

about... what I've spent so long
searching for.

But I'm not here as a spectator.

Yeah.

There are hundreds, if not
thousands of these.

This is what the barbel run
is all about.

Whoa.

Catfish... lots of them.

But the catfish aren't
what I'm after.

I've been told that all this
commotion will draw in

the second wave of
predators... the tigerfish.

And before long, I'm witnessing
a real feeding frenzy.

This is just... this is just
incredible.

The amount of activity is just
incredible.

This is a real phenomenon.

My gosh.

Ah.

There are fish there just
holding their open mouths out of

the water, presuming just
treading water with their tails,

and they're just waiting.

And the baitfish are
flying in the air.

So, presumably, they're just
waiting for the fish

to land in their mouths.

Absolutely incredible.

The water just so full of fish
and just in your ears, as well.

The sound... it's like the water
doesn't just look like it's

boiling, it sounds like it.

I've just never seen anything
like this before.

To see such a sight in
freshwater,

it's really incredible.

I need to get a bait back in the
water, into the middle of this

carnage, to finally prove that
tigerfish are here,

hunting in packs.

Fish on.

This is what I came here to see.

Looks like I'm finally in the
eye of the storm.

This is not carnage going on
behind the reeds or in some sort

of marsh where I can't see it.

This is at the river's edge, and
the predators are just hammering

into the baitfish.

My lure, when it goes
in there, as well,

is getting the same treatment.

I'm hooking one
tigerfish after another.

This is the proof I'm after.

Well, this is the fish.

This is the fish, and the
evidence is right behind me.

It's in my ears.

I mean, just the sound of the
feeding frenzy is going on

as I hold this fish.

So this is not just
a solitary hunter.

There is a pack of them down
there, filling the air

with the sound of just
frenzied predatory activity.

People think piranhas are scary.

Piranhas are just a few inches.

You know, maybe a pound,
2 pounds.

A fish this size, operating in a
pack is a monstrous thought.

Ah, yeah, yeah. Ah!

The fact is, if you get a bait
in the right place, just these

things, one after the other,
will just pile into it.

And I think, without a doubt,
this is a very likely candidate

for what put fate to those
people in the ferry.

So, we're not just talking a
solitary animal down there.

We are talking a pack.

We're almost talking
a super organism.

So the biomass of these in a
small volume of water

is quite frightening.

Piranhas, in comparison,
look quite puny.

We've got a pack of
these things down here.

I've heard firsthand accounts of
their raw aggression.

I've seen their brutal hardware.

And by catching so many in quick
succession, I've shown they most

definitely hunt in packs.

I'm left in no doubt that a
frenzy of these mouths could

easily have disposed
of the ferry victims.

So I think, by any
definition at all,

this thing is a
real river monster.