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The Elusive Sabertooth Fish | Expedition Guyana | BBC Earth - Video học tiếng Anh
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The Elusive Sabertooth Fish | Expedition Guyana | BBC Earth
The Elusive Sabertooth Fish | Expedition Guyana | BBC Earth
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0:02
[music]
0:04
>> Steven Fills fish survey continues.
0:09
They've already found huge piranhas.
0:12
Now, with the help of local fishermen,
0:15
they're hoping for a far more impressive
0:17
catch.
0:25
>> Okay.
0:28
>> No, no, no, no, no.
0:29
>> All right, this is big fish.
0:31
>> Big?
0:32
>> Big.
0:35
>> WOW, LOOK AT THE SIZE OF THAT.
0:37
>> IT'S A BIG ONE.
0:39
>> YES, YES, YES, SURE.
0:42
>> YEAH.
0:43
>> [snorts]
0:43
>> THAT IS A
0:44
>> OH,
0:45
THAT'S UNBELIEVABLE.
0:47
That
0:49
is the banana catfish.
0:51
Surveying fish is not easy.
0:54
>> [snorts]
0:54
>> They must identify each species and
0:57
return them to the water as quickly as
0:59
possible.
1:01
>> You can tell it's called the banana
1:02
catfish cuz it's yellow on the belly,
1:04
like a banana.
1:05
>> And probably a good sort of 20 years
1:07
old, would you say, Phil?
1:08
>> Could be older. These fish can live a
1:09
long time.
1:10
>> Now, this this fish is just covered in
1:12
parasites.
1:13
>> It won't pop out.
1:15
It won't pop out.
1:15
>> Don't lose it. Don't lose it. Oh, we've
1:17
got another one. We've got another one,
1:18
Phil.
1:18
>> Okay, keep him. Where is it?
1:19
>> Just down there, look.
1:20
Another one there, look. Another one
1:21
there, look. It's actually scattering
1:23
blood everywhere. It's like a full
1:25
leech.
1:25
>> Look at that. Okay.
1:27
>> Let's put our friend here back in
1:30
cuz he's absolutely wonderful and we
1:32
wouldn't want to harm him. So,
1:34
old fella, off you go.
1:37
Absolutely fantastic.
1:38
>> Excellent.
1:39
>> Absolutely nothing like as exciting
1:42
as what we've got in here.
1:44
The parasitic fish Steve's collected are
1:47
known as vampire catfish or candiru.
1:51
Apparently, if you stand in the water in
1:53
these areas and you you go to the
1:55
toilet,
1:56
will swim up the stream of urine and
1:59
right inside you and lodge inside you
2:02
using two backward-facing spines. These
2:05
candiru actually swim in, latch into the
2:07
gills of a large fish, and drink the
2:09
blood. You can see this one here which
2:11
dropped out of the gills is absolutely
2:15
thick full of blood. The big lesson, I
2:17
guess, is
2:18
if you're in the river, don't go for a
2:20
wee.
2:29
>> Steve's discovered what rules the depths
2:31
by day.
2:34
Now he wants to learn what hunts by
2:36
night.
2:41
>> Oh my god.
2:44
>> These are called saber-tooth characins.
2:46
They're saber-tooth tetras.
2:48
>> It's the nearest-looking thing to an
2:49
actual monster I've ever seen. It
2:51
certainly deserves its saber-tooth name.
2:53
That is incredible.
2:55
>> These teeth are so long, they need
2:57
special sockets in their skull to
2:59
accommodate them. Otherwise, they would
3:00
just pierce their brains.
3:02
>> Oh god. Okay.
3:03
>> This is a top predator. They're
3:05
extremely fast. They swarm around. They
3:07
come up below fish and just spear them
3:10
and just kill them instantly. Just like
3:11
that. They just spear them. The fish are
3:12
immobilized and then they eat them.
3:15
>> I've got my fingers disturbingly close
3:17
to those teeth, actually. I would
3:18
imagine that those would just go
3:19
straight through to the bone, wouldn't
3:22
they?
3:22
>> Oh, they'd go right through your hand.
3:23
Oh, no doubt about it. They're very
3:25
strong.
3:25
>> He's got to go back. Um I just wish I
3:28
could see if I can put him in without
3:29
losing my hand.
3:30
>> Yeah, right. Yeah. Careful.
3:33
Now we're seeing the night shift. Big
3:35
catfish and saber-tooths. By day, the
3:37
piranhas rule the rivers. You're never
3:39
safe.
3:58
>> Mhm.
