All language subtitles for B.W.S08E11.Double.Jaw.Eel.1080p.AMZN.WEB-DL.DD2.0.H.264-playWEB_track3_[eng]

What's going on,
everybody, and welcome back

to another "Blue Wilderness"
adventure here on the edge

of the Caribbean Sea at night.

Now we're at Grand
Cayman Island,

and we did come here
to swim with stingrays

at Stingray City.

And that was awesome.

We saw all kinds of cool
reef fish and, of course,

got up close and personal
with those giant rays,

but if we truly want
to see something

unique, something
really bizarre,

the best time to do
that is at night.

So what we're going
to do is we're

going to get our
dive gear ready,

head out into the
darkness of the sea,

and get up close with some
of the most alien looking

creatures you can imagine.

Before we can make our
descent, we had to swim away

from shore out to deeper water.

The visibility along the
way was poor and churned up

by the waves making
this process much

more nerve racking than usual.

Plunging into dark water is
without question disorienting.

And it isn't until you regain
your visibility and bearings

that your instincts to turn back
retreat and allow you to press

forward further into darkness.

My eyes struggled to scan
the empty space around me

for a glimpse of anything,
but just like that,

we have our first visitor.

Drawn in by my
camera lights, I find

these Caribbean reef
squids stunning and very

interesting to observe.

Oddly enough, it actually might
be as equally interested in me.

They can be quite the characters
and are extremely intelligent.

It's mesmerizing how its bright
coloration and translucent skin

glimmer as it flutters its fins
against the dark inky water.

Isn't it incredible how it
can remain in perfect position

with so little effort.

Closely related to
octopus and cuttlefish,

these torpedo shaped cephalopods
have 10 appendages set in front

of two very large complex eyes.

And while Caribbean
reef squid are

normally social
creatures seeing one

all alone isn't that uncommon.

Wow, they really are something.

What an interesting creature
to kick off tonight's dive.

It's a surreal sensation to
descend into the black abyss

of the ocean at night.

Some would argue the
scenario would easily

rank as their greatest
fear, and I wouldn't

necessarily blame them.

Your first night
dive can be scary.

Luckily, our camera lights
are strong and almost

create a force field
literally pushing back

the fear of the unknown and
establishing the reality

that exists in front of us.

I learned long ago that a
strong sense of curiosity

can be the best defense
against any fear.

Curiosity, like our dive
lights, can illuminate our minds

to focus on what
we can see instead

of imagining what figments
may exist beyond the shadows.

And in this world,
almost anything

my light touches brings
my curiosity to a boil.

The weightlessness
of diving combined

with this foreign landscape
feels like nothing

less than a space odyssey.

So in the spirit of worlds
beyond our imagination,

tonight we are on the
hunt for something

truly bizarre as I
hope to encounter

the aliens of the reef.

Between the maze of
shapes and spectrum

of vivid colors that
make up the coral reef,

its inhabitants are equally
as colorful and unusual.

And as I get closer to the reef,
many of the smaller creatures

start to reveal themselves
like this arrow crab.

As are most of its
other crab cousins,

this one is an opportunistic
feeder hunting for worms

and other easy prey items.

But if that doesn't look like an
alien, I'm not sure what does.

OK, let's move on and
see what we can find

on the other side of the reef.

Oh, wow, so in complete
contrast to the arrow crab,

here we have a huge reef
spider crab also known

as a channel clinging crab.

This species of spider
crab are commonly

found in waters off of
Florida, the Bahamas,

and various Caribbean
islands, but this one is

by far the largest I've seen.

We're currently at about
60 feet below the surface,

but these crabs can
actually be found--

get this-- in
excess of 100 feet,

a depth we don't often
explore for marine life.

But maybe we should
search for some deep water

creatures on a future dive.

The walls of the reef are
really impressive covered

in brightly colored sponges that
tower up at steep angles giving

way to flatter coral beds.

Wait, what was that?

I heard a crunch, like
some sort of popping sound.

Whoa, that's what I heard.

That grunt just
smash that smaller--

oh, and look at that.

There's an octopus.

Did you see it before
it changed color.

That's a Caribbean reef
octopus and a big one, too.

This is definitely the all
star creature of the night.

Now they can be extremely
difficult to find

but once spotted will
flicker with color,

and these color
displays are remarkable.

It's both attempting to
blend in with the reef

to camouflage itself, and
just when I get close enough

does that.

That is a defensive display.

See it flash white and blue
and balloon up to appear

larger than it really is.

It's incredible how adaptive
these creatures are, not only

able to change color but also
able to change their shape

and skin texture completely.

Seeing these behaviors
is very rare.

This is actually the first
time I've ever witnessed it.

Now let's talk about danger.

All octopus are venomous
including this one

and use their beaks
to inject their prey

with a toxic saliva
that paralyzes

them while they're consumed.

However, unlike their smaller
cousin the blue-ringed octopus,

this species does not
have a lethal bite

when it comes to humans.

But besides their venomous
ways and bizarre appearance,

these animals are
indeed strange.

Having three hearts,
360-degree vision,

and possessing
inexplicable intelligence

has some scientists suggesting
that these creatures are indeed

aliens from another world.

In fact, there are few fossil
records to suggest otherwise,

but we'll save that
debate for another video.

OK, well, our computers
are telling us

it's time to return
back to the surface,

but what an epic way
to end our adventure.

Wow, that was by far the biggest
octopus I personally ever

seen out here in the
Caribbean, and it showed

us all kinds of crazy displays.

I mean, it changed
color a dozen times.

It went from blues to reds
to oranges to stripes,

and then it had those
brilliant dominance displays

where it ballooned
up and tried to make

itself look bigger on the reef.

That was incredible.

I cannot believe we
just witnessed that.

And how about that
Caribbean reef squid.

That's nothing to shake
a stick out either.

That was pretty awesome
to see the bioluminescence

cascading up and down its fins.

And I hope everybody
at home enjoyed

tonight's night adventure
just as much as we did.

The crew and I are
absolutely exhausted.

We're going to get
this gear off and head

back home for the evening.

I'm Mark Vins.

Be brave, stay wild.

We'll see you on the next dive.

While a person's
first night dive

can be a frightening
ordeal, I have

found that any journey through
this mystical landscape

will quickly replace feelings
of fear with pure excitement.

These days whenever I have
the chance to dive at night,

I find myself jumping
at the opportunity,

literally, just as long
as my light batteries

are fully charged.

What's going on, Brave crew?

We're back in
Queensland, Australia,

about to head off for another
epic tide pool adventure,

and we absolutely love these
tide pools because they're

jam packed with super unique
creatures including some

of the most deadly on Earth.

So if you're ready, it looks
like the tide's headed out,

which means it's time for
us to get our feet wet

and try to find something
we've never seen before.

OK, let's go.

So you'll notice that all
of the surface of the rocks

right now is wet and slippery.

We want to move extremely slow.

The last thing we want is for
someone to take a nasty spill

because we're moving too fast.

Looks like there might be
some more pockets ahead.

Let's head up a little
bit further this way

and make moves toward the point.

Hey, guys, I think
I got a crab here.

Got him.

Ha, ha.

This is a swift-footed
shore crab,

and they are very difficult to
catch because like their name

they are very swift.

Now these crabs are very, very
common in these tide pools.

In fact, we were here last
year, and I caught one.

I took a photograph and
put it on Instagram,

and it was one of my
most like Instagram posts

of our entire
production last year.

But unfortunately we
could not catch one again

to get it on camera,
so I'm really

happy that I was able to find
one today to show you guys.

This one does feel like it did
just molt, which is perhaps

why it was a little
easier to catch

and maybe a little bit slower.

I can tell that because
its shell is slightly soft.

But what's really
cool about crabs

is they're sort of like the
custodians of the tide pools.

They're like the cleanup crew.

They're opportunistic
omnivores, so they're

out here eating a lot
of the dead things

and all the carrion.

And they also eat some of
the plant life including

some of the algae and
some of the plankton scum

that washes up, so they do
a very good job at managing

these tide pools and keeping
them pristine for all

the other creatures.

So thank you for doing that and
we're going to let you go now

so you can go about your day.

See you, buddy.

Thanks for hanging out.

There he goes.

Oh, look at this.

This tide pool is
brimming with life.

It's a lot of fish, a
lot of fish around here.

Wait a second.

That is a cone snail, and
cone snails are very venomous.

So what I want to do real
quick is I'm going to place

the cone snail on this glove.

This is actually sting proof
and bite proof to use when

you handle venomous creatures.

All right, there you have it.

You can see that
patterning on the shell,

and that's how I was able to
identify it as a cone snail.

Some might say this is actually
an aposematic coloration

because of how venomous
this creature is.

You can actually see its foot
reaching out to right itself

right now.

That's pretty cool.

All right, so let's talk
about what makes a cone

snail such a lethal predator.

They're actually armed with
a very specialized radular

tooth up by their mouth.

They can actually shoot
a venomous barb out

like a harpoon to
dispatch their prey.

Now this barb is laced
with a neurotoxic venom,

so it immediately paralyzes
the prey so then the snail

can catch up and consume
it because some of them

actually eat fish.

And those cone
snails are actually

very dangerous to human beings.

So if you're ever going
to come out shelling

or pick up a snail in
this region of the world,

you definitely want to be
aware of what a cone snail

looks like before you do so.

All right, let's put it back
and see what else we can find

out here in the tide pools.

Well, I have good
news and bad news.

The good news is we've already
found some pretty cool animals.

The bad news is
the weather that's

been pushing through
the last few days

is really not letting
this tide drop quite

as low as I thought it would.

So I have a GoPro
wearable that I'm

going to throw on
my shoulder, and I'm

going to head out there with
this net, get in those rocks,

and hope to get lucky.

Whoa.

I'm glad I moved that mic back .

Nothing around here.

I'm going to move
through this way.

Getting a little precarious.

Oh, boy.

Woo.

I'm really glad the mic pack's
on this side and not that side

because I just got drilled.

This storm surge is for real.

OK, let's make your
way around here.

Getting soaked.

Nothing.

Seeing a bunch of fish
darting in and out.

Hold on.

What's that?

There's something right there.

An eel.

Oh my goodness.

Check this out.

Wow.

Look at that.

OK, I can't keep it out
of water for too long.

We got to go find a spot
to do the presentation.

Let's go over here
to this pocket.

Wow.

I think what I want
to do to present

this eel because I can't really
handle it out of the water.

I'm going to put it
in one of our cubes.

Here.

Can somebody hold that eel in
the water there just like that?

OK, cool.

I get my pack off.

Let's fill this up with water.

OK.

This is a delicate
little maneuver.

Now get this real quick.

OK, got it.

Perfect.

Yes.

First things first, let's
talk about the type of eel

that we found here.

This is a snowflake eel.

It's called a snowflake
eel because as you can see

on its side through
the center line,

it has all these
beautiful patterns

in the shape of snowflakes.

Now an eel is actually
a fish, not a snake.

A lot of people confuse
these animals with snakes,

with sea snakes, and
they are not venomous

like a sea snake at all although
they do have razor sharp teeth.

In fact, they have
two rows of teeth

on the top, one row of teeth on
the bottom, and then get this.

Inside their throat,
they actually

have another set of jaws called
the pharyngeal jaws, which

is an inner jaw structure
that it uses to actually munch

on its meals and draw in food
as it has the rest of the prey

item clasp in those front teeth,
which is pretty creepy if you

think about it but a highly
adapted mechanism that has

allowed these eels to thrive
in ecosystems like these tide

pools in Australia.

Wow, did you see that?

It's trying to bite
its reflection.

Now eels in particular
are actually

fairly aggressive animals.

They're actually
one of the animals

we have to worry the most about
when we're out there diving.

They don't really
back down they're

very courageous
creatures, and they're not

really afraid of human beings.

And they have been known to
attack divers at times when you

get too close, so whenever
we see eels underwater,

we always want to keep our
safe distance from them.

But in a unique situation like
this, I'm able to take an eel

and put it in a
container and get it

right up close to the camera.

That is so amazing.

Now eels have extremely
poor eyesight.

Even though it has
very beautiful eyes,

those bright yellow eyes
on each side of its head,

they really can't see very
well, so they rely heavily

on their sense of smell.

Their sense of
smell is incredible.

In fact, if we get
a tight enough shot,

you can see it has these little
yellow appendages coming out

of its nostrils,
and it can use those

to direct its sense of smell.

So it's a pretty cool little
adaptation that it has.

And these animals
like most mores

can filter waters by opening
and closing their mouths

and then dragging the
water across their gills

for respiration.

Well, I say that caps off an
excellent adventure today.

We came back out to
Australia's tide pools

to find something we've
never found before.

And lo and behold, we
find our very first eel.

I'm Mark Vins.

Be brave, stay wild.

We'll see you on
the next adventure.

All right, let's let this
one go and head home.

Hi, everybody.

I'm Mark Vins and welcome
to a special edition

of "Blue Wilderness."

So far on this series, we've
encountered some pretty

incredible marine animals,
but nothing has sparked

our imaginations like sharks.

And, man, have we seen sharks.

Near the Bahamas we swam
next to a great hammerhead,

got up close with some
massive tiger sharks.

That was a little too close.

And who can forget that
slumbering lemon shark that I

was actually able to pet.

These were some of the most
eye-opening experiences

of my entire life and have
most certainly changed the way

that I think about sharks.

As we all know by now,
they are certainly

not the brutal killers that
movies portray them to be.

They are ancient,
graceful, and often

curious creatures that play
a tremendously important

role in our ocean ecosystems.

But no matter how close we get
or how crazy the footage is,

we always get these
two questions.

One, Mark, aren't you afraid
you're going to get eaten,

and, two, what in the
world are those little fish

stuck to the sides
of the sharks?

To answer the first
question, no, I'm not

afraid of being eaten, guys.

But that doesn't mean we
don't have to be cautious.

We are extremely careful
around these apex predators,

but truly they aren't
interested in eating us at all.

And to answer the
second question,

those little creatures
are called remoras.

And like the shark, their
role in the undersea world

is a little more complicated
than it may seem.

We've encountered remoras
almost everywhere we've been.

Sometimes referred to
as the sucker fish,

these amazing
animals front dorsal

fins have evolved
over millions of years

into an organ that acts
like a suction cup,

and with this suction cup, they
can sneak up underneath a shark

and very carefully hitch a ride.

But it doesn't just
piggyback on sharks.

The remora will latch
onto a wide variety

of large marine animals
including rays, whales, larger

fish, and even sea turtles.

So you might be asking
yourself what gives.

Why do they do that?

Are they just lazy?

Not at all.

In fact, many believe that their
interaction with their host

is actually a well-adapted
strategy that creates

a mutualistic relationship.

Mutualism is a type of
symbiotic relationship

in which two different
biological organisms

both benefit from each other.

In other words, the
shark and the remora

are both positively affected
by this little arrangement.

While the shark will give the
remora a ride and easy access

to food, the remora
in turn feeds off

the scraps and parasites
found on and around the shark,

keeping it both
clean and healthy.

Now that's not to
say that sharks

and other large
marine animals always

love having a bunch of
sucker fish attached to them.

You can imagine the
enormous drag created by all

those fish along for the ride.

This relationship between
the remora and other larger

marine animals has evolved
over millions of years,

and seeing those fish swimming
along with these massive sharks

reminds me of the
interdependence of all things

in the marine ecosystem.

Our oceans consist of an
enormous and delicate web

of life.

Every species depends in
some way on every species

whether it's for food
or just a good old

fashioned parasitic cleaning.

We've seen a lot so far
on "Blue Wilderness,"

but in truth, we've only just
begun to scratch the surface.

It is estimated that only
5% of our world's oceans

have actually been
mapped and explored.

So it sounds to me like we've
got a whole lot of adventures

ahead of us, and I can't wait.

Until next time, I'm Mark Vins.

Be brave, stay wild.

And we'll see you
on the next dive.