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Meet incredible sea creatures right now! Learn more interesting facts about them and the seabed!
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00:00Think you know what lurks in the depths of the ocean?
00:03While nearly 95% of our oceans haven't been explored yet,
00:07it's hard not to let your imagination run wild.
00:11But thanks to brave explorers, deep-sea cameras, and awesome archaeologists,
00:16we do know about some pretty incredible sea creatures living in our waters today
00:21and millions of years ago.
00:23From the 9-foot spider crab to the 60-foot prehistoric megalodon,
00:28these sea dwellers come in all shapes and sizes.
00:31But let's focus on sea creatures famous for their huge size.
00:36Can you guess which living species of whale is the largest?
00:40Well, it's not the orca, but that's a good guess.
00:43The orca is a toothed whale that can grow to anywhere from 23 feet to 32 feet,
00:49which is slightly smaller than a school bus.
00:52How about the narwhal?
00:54Nope, they're not the biggest either.
00:56These unicorns of the sea live mainly in arctic waters
01:00and only grow 13 feet to 20 feet in length.
01:03And that's including their 9-foot tusk.
01:06Tired of guessing?
01:08Okay, I give in.
01:10The largest whale that still exists today is the blue whale.
01:13At a jaw-dropping 82 feet to 105 feet,
01:17the blue whale is not only the biggest whale we know of,
01:20but is currently the largest animal to have ever lived on Earth.
01:24Seriously.
01:26These animals are bigger than a T-Rex.
01:28And even the prehistoric megalodon.
01:31If you were to put a blue whale next to a school bus,
01:34it would look like it could swallow it.
01:36Think about that.
01:38According to National Geographic,
01:40a blue whale's tongue can weigh the same as an elephant.
01:43And their hearts can weigh as much as a car.
01:46That doesn't even sound possible.
01:49It's no wonder these giants need to eat about 4 tons of krill every day.
01:55While there aren't too many animals living today
01:57that can compete with the blue whale's epic proportions,
02:00there is an entirely different species that is a good contender.
02:04And it's not quite what you would expect.
02:06It's a jellyfish.
02:08No, I'm not talking about the little jellyfish
02:11that wash up on the shore
02:12and ruin a perfectly good day at the beach.
02:15I'm referring to the lion's mane jellyfish,
02:18the biggest jellyfish around.
02:20This invertebrate can grow up to 120 feet long.
02:24They also come in different gorgeous colors,
02:26like red, purple, or even shades of orange.
02:31As if their length wasn't impressive,
02:33the lion's mane jellyfish boast a whopping 8 sets of 70 to 150 tentacles.
02:40That means they can have up to 1,200 in total.
02:44And here's the giant oceanic manta ray,
02:47the largest type of ray in the world.
02:50Their wingspan can be longer than a bus.
02:53These guys can reach 30 feet in length.
02:56They also have the biggest brain compared to body size among all fish.
03:01Unlike their stingray cousins,
03:03mantas don't have venomous tails.
03:07And while the lion's mane jellyfish and the blue whale
03:10are yet to be beaten for the longest sea creature,
03:12there is one marine creature that can grow even larger in length.
03:16The Portuguese Physalia physalis.
03:19Tentacles and all,
03:21can reach a length of 165 feet long.
03:24And that's according to mentalfloss.com.
03:27While this thing may look a lot like a jellyfish,
03:29it's actually known as a siphonophore.
03:32And there are hundreds and sometimes thousands of them
03:35that are genetically identical.
03:38Their long tentacles help the organism catch prey.
03:42And its sting is fatal to most animals,
03:45even humans in some cases.
03:46What's even creepier is that
03:48if one of the tentacles comes off the organism for whatever reason,
03:52it can float around the water for days before decomposing.
03:56Even if it's detached,
03:58this tentacle can still sting you.
04:00But don't go running out of the ocean just yet.
04:03Your chances of being hurt by a Portuguese Physalia physalis sting
04:08are pretty slim.
04:10However, if you do get stung,
04:12the side effects aren't pretty.
04:14With welds,
04:15stomach cramps,
04:16an elevated heart rate,
04:17and an upset stomach.
04:19While you don't want to go anywhere near these long creatures,
04:22they sure are pretty to look at.
04:24Check out all those colors!
04:28The Shastasaurus is the biggest marine reptile that has ever existed.
04:32These predators lived during the late Triassic period,
04:35about 210 million years ago.
04:38These amazing giants could reach lengths of up to 69 feet
04:41and weighed more than 75 tons.
04:45This made the Shastasaurus as heavy as a blue whale.
04:49And if you could stand this creature up vertically,
04:52it'd be as tall as a seven-story building.
04:55Despite appearances,
04:57the Shastasaurus was actually pretty slim for its size.
05:00Its ribcage was only six feet across.
05:03You'd think that this big guy was chowing down on other dinosaurs,
05:07but that's not the case at all.
05:09This reptile survived on a diet that consisted of small fish
05:13and cephalopods,
05:14like octopuses and squids.
05:17The Alberto Nectes is a bright representative of the Pliosaur family,
05:22meaning that this marine reptile had a small head
05:25on an incredibly long neck and large flipper-like limbs
05:28that helped it move through the water.
05:31These creatures occupied the seas around North America
05:3476 to 70 million years ago.
05:37The length of this sea monster could reach 38 feet,
05:41with its neck taking up 23 feet of that length.
05:45Its neck was a true record-breaker.
05:47It had a whopping 76 bones in it.
05:50No other animal known to humankind
05:52has had so many vertebrae in its neck.
05:56Scientists aren't sure why they needed such a lengthy neck.
06:00They might have used it to collect shellfish off the seabed.
06:03Or perhaps it helped them capture their main prey,
06:06fish and squids.
06:08This aquatic reptile also had gastroliths in its stomachs.
06:11Some of them were as big as 5.5 inches in diameter.
06:16The Tylosaurus belonged to the Mosasaur family.
06:20It dominated the shallow seas of North America
06:23about 85 to 80 million years ago.
06:25This was an enormous predator,
06:28with the biggest representatives reaching 45 feet in length.
06:32It had a narrow, hydrodynamic body
06:34with a blunt, powerful head
06:36that the animal used to ram and stun its prey.
06:40Its body was equipped with agile flippers
06:42and a long tail decorated with a maneuverable fin.
06:46The Tylosaurus was a carnivore,
06:48and its diet included not only fish,
06:51turtles, and small sharks,
06:53but also other mosasaurs,
06:55pleiosaurs, and flightless birds.
06:58Meet Ophthalmosaurus.
07:00This prehistoric reptile thrived
07:02during the late Jurassic period
07:04and lived in oceans all over the world.
07:08Ophthalmosaurus weighed somewhere around 6,000 pounds
07:11and grew to approximately 16 feet long,
07:14according to NewDinosaurs.com.
07:16That's about the same length
07:18as the beluga whale that exists today.
07:20It's too bad these guys went extinct
07:22before we had a chance to see them ourselves,
07:25as their cartoonish white eyes
07:27and dolphin-like features are pretty darn cute.
07:30Of course, the Ophthalmosaurus evolved over time
07:33to become ophthalmologists,
07:35or eye doctors that we know today.
07:37No, that's just a lie.
07:39Just testing you.
07:42The Mosasaurus is a truly gigantic predator
07:44that dominated the seas all over the world
07:47about 66 million years ago.
07:49According to fossil evidence,
07:51some specimens could be more than 50 feet in length.
07:54This fact makes the Mosasaurus
07:56the biggest marine carnivore of its time.
07:59One of the most terrifying things about this creature
08:02was its crocodile-like head,
08:04decorated with literally hundreds of razor-sharp teeth,
08:07neatly organized in two rows on both jaws.
08:10The thing is that it was pretty challenging
08:13for the Mosasaurus to grab its prey in the water.
08:16That's why it had all these teeth,
08:18plus something special.
08:20Pterygoid teeth anchored to the bones
08:22on the roof of its mouth.
08:24This made hunting and holding onto its prey much easier.
08:29The Styxosaurus belonged to the Pleasaur family
08:32and lived during the Late Cretaceous period,
08:34around 85 to 70 million years ago.
08:37Upon first glance at this dinosaur,
08:39you might mistake it for a sea snake,
08:41and it'd be an honest mistake.
08:44Styxosaurus were about 35 feet in length,
08:47but over 16 feet of that
08:48consisted just of their long, snake-like neck.
08:51They had a comparatively small body
08:53and weighed approximately 4 tons.
08:56Their mouths were full of razor-sharp,
08:59cone-shaped teeth that they used to catch fish.
09:01They didn't need to chew their prey,
09:03thanks to the 200 small stones called gastroliths
09:07in their bellies
09:08that probably aided in digestion.
09:11The Stonefish
09:14Stonefish aren't going to win any beauty contests,
09:17unless the pageant is for best rock look-alike.
09:20Their tiny, unreflective eyes and rough skin
09:23blend in perfectly with their environment.
09:25A large head,
09:26an even bigger mouth,
09:28and a home full of,
09:29yeah,
09:29it's rocks.
09:31And just because you're on the beach
09:33doesn't mean you're safe.
09:35Stonefish can survive for 24 hours
09:37out of the water.
09:39Stepping on one,
09:40or even handling one,
09:42won't be that fun.
09:43Their dorsal fin spines
09:45have extremely strong venom.
09:47It shoots out when they get stepped on,
09:49and it can lead to paralysis
09:50or even heart failure.
09:52You'll need help fast.
09:54No wonder they're one of the most dangerous creatures
09:57in the water,
09:57or anywhere.
09:58Be careful when scrambling around rocky areas.
10:01They love to play hide-and-seek.
10:05The Deep Sea Dragonfish
10:08If there were a prize
10:10for the most hideous fish in the ocean,
10:12the Deep Sea Dragonfish would win.
10:14With slimy,
10:16scaleless skin,
10:17massive teeth,
10:18and a face only a mother could love,
10:20this bad boy of the sea
10:22is nothing to mess with.
10:23It likes to swim between 700 feet
10:26and 6,000 feet
10:28below the surface of the ocean,
10:29where the waters are the darkest and coldest.
10:32Along with some other creatures on this list,
10:34the Deep Sea Dragonfish relies on its
10:37bioluminescent body parts to catch prey.
10:40It also uses its hanging appendage,
10:43which boasts a little red light on the end,
10:45coming out from its lower jaw.
10:47Many fish mistake this little light for prey,
10:51luring them right into the jaws of the Deep Sea Dragonfish.
10:54Very clever dragonfish.
10:56Very clever indeed.
10:59The Fangtooth
11:02The Mariana Trench
11:03is an underwater trench
11:05with a depth of 35,000 feet,
11:07nearly 7 miles below the ocean's surface.
11:10Let that sink in.
11:12While scientists know the Mariana Trench exists,
11:15it's one of the least explored places on Earth.
11:18It's also the deepest area of Earth's oceans.
11:21And although many creatures down there
11:23probably haven't even been seen by humans yet,
11:26scientists have had the creepy pleasure
11:28of getting to know the Fangtooth.
11:31The Fangtooth fish shamelessly lives up to its name.
11:35Just look at that thing.
11:36The Fangtooth is carnivorous
11:38and feeds on just about anything it can find
11:41that gets caught in its sharp-toothed mouth.
11:44These fish rely on their
11:45contact chemoreception to find prey.
11:49In other words,
11:50they can sense chemical residue
11:52that comes off of other living organisms in the Deep Sea.
11:54This is because they don't have
11:57any light-producing cells on their bodies,
11:59unlike many other Deep Sea fish.
12:01On top of all that,
12:03it's pretty dark down there,
12:05so whatever crosses their path,
12:07they chomp on.
12:08While these guys look pretty scary,
12:10they're not a threat to humans.
12:12They only grow about 7 inches long.
12:15Even so,
12:16I wouldn't want to run into one of these things
12:18during a relaxing swim in the ocean.
12:22The Dunkleosteus
12:25Strangely enough,
12:26this prehistoric fish,
12:28known as the T-Rex of the seas,
12:30had no teeth.
12:31Those were replaced with bony plates
12:34that allowed it to have the strongest bite
12:36among other monsters of its size.
12:39The Goblin Shark
12:42If you thought the movies about sharks were scary,
12:46this next deep-sea creature
12:47will make you swear off
12:48going for dips in the ocean forever.
12:51However,
12:52it lives 3,000 feet underwater,
12:54so you'll never likely see it face to face.
12:57The Goblin Shark
12:59looks like a cross between a shark
13:01and a creature from your worst nightmare.
13:03These sharks boast a protruding sword-like snout
13:07with a jaw that juts out to match.
13:09Unlike other sharks that have more of a grey hue,
13:12this creepy thing looks not so pretty in pink.
13:16Aside from their scary demeanor,
13:18what do scientists really know about the Goblin Shark?
13:21Well, not much,
13:23except that they can grow up to 18 feet in length.
13:26Looks like there's still a lot to learn about these guys,
13:29if you dare to.
13:32By the way,
13:33did you know that sharks don't sleep?
13:35Many species have to keep water moving over their gills to get oxygen,
13:40so they can't fall into a deep sleep like we do.
13:43That's why they stay half-awake during rest.
13:46Typically,
13:47sharks don't even close their eyes.
13:50The Cookie Cutter Shark
13:54This shark is a living horror,
13:56with lower teeth being big and sharp,
13:58while the upper ones are much smaller.
14:01When its teeth fall off,
14:02the shark eats them to maintain calcium levels.
14:06Pretty smart solution for a shark.
14:09The Frilled Shark
14:13Studying the frilled shark
14:14is like looking through a portal back to prehistoric times.
14:17That's because scientists think
14:19that these eel-like sharks
14:21haven't changed much
14:22since their oldest ancestors roamed the deep sea waters,
14:26so they're sometimes referred to as living fossils.
14:29These sharks' mouths
14:31are filled with a terrifying 25 rows
14:33of backward-facing sharp teeth.
14:35300 in total!
14:37They're designed to grasp prey
14:40and hold them tight so they can't get away,
14:42according to early studies of the shark
14:44conducted in 1884
14:46and published in
14:47The Bulletin of the Essex Institute.
14:50Luckily for swimmers,
14:51the frilled sharks
14:52live between 390 feet
14:55and 4,200 feet
14:56below the ocean's surface,
14:58so they'll probably never run into them.
15:01Probably.
15:02This is probably the worst nightmare
15:04of any dentist.
15:05The Northern Stargazer
15:09Take a look at this cutie.
15:11The Northern Stargazer
15:12is definitely not something
15:14you'd wish to see on the ocean floor.
15:16This horrid creature
15:18hides its body under the sand,
15:19leaving its face above
15:21to wait for prey.
15:25The Tasseled Wobbegong
15:29Here's another carpet shark
15:31on our list.
15:32It lies low on the bottom of the sea
15:34and patiently waits
15:35for its prey to come by.
15:38The Australian Ghost Shark
15:41The Australian Ghost Shark
15:43isn't really even a shark,
15:45but a very bony fish.
15:47It's also a living fossil.
15:49It hasn't changed
15:50within the last 400 million years.
15:54Believe it or not,
15:55sharks and humans
15:57have a common ancestor
15:58that lived around
15:59440 million years ago.
16:01Even though we both evolved
16:03in our own way,
16:04there are still some signs
16:06of that connection.
16:07For example,
16:08the genome of an elephant shark
16:10is very similar to humans.
16:15The Leopleurodon
16:17This list of terrifying creatures
16:19would be incomplete
16:20without mentioning
16:22the terrifying
16:22and prehistoric
16:24Leopleurodon.
16:25This carnivorous marine reptile
16:28existed during
16:29the Colovian stage
16:30of the Middle Jurassic era
16:32and ruled the waters
16:33at 9 feet in length.
16:35Scientists believe
16:36Leopleurodon thrived
16:38in this deep-sea trench
16:39because of its ability
16:41to swim long distances
16:42and its four paddle-like limbs.
16:45While they probably
16:46weren't able
16:47to propel themselves
16:48toward prey
16:48like other animals
16:49of the area,
16:50they did manage
16:51to accelerate
16:52and attack
16:53very ruthlessly
16:54and efficiently.
16:55Additionally,
16:56they relied on their long
16:58snouts to smell prey,
17:00which leads scientists
17:01to believe
17:01they didn't rely
17:02on sight for hunting.
17:04This means
17:05they could have thrived
17:06in the dark
17:07Mariana Trench.
17:09Around 150 million years ago,
17:12Leopleurodon
17:13became extinct
17:14due to competition
17:15for prey
17:16against other thriving
17:17marine reptiles.
17:18and I think
17:19I speak for all of us
17:20when I say
17:21thank goodness
17:22for that.
17:25Considering that
17:26scientists have only
17:27explored 5%
17:28of the ocean floor
17:29and found some
17:30of the scariest
17:31sea creatures imaginable,
17:32one can only dream
17:33of what other animals
17:35reside in the deep-sea waters.
17:37Perhaps it's best
17:38to keep them
17:39in your imagination.
17:40Am I right?
17:42The Megamouth Shark
17:45This shark
17:46is a filter feeder
17:47and it's friendly
17:48to humans,
17:49although its huge mouth
17:50can look quite threatening.
17:52Like basking sharks,
17:54it swims
17:55with its mouth
17:56constantly wide open,
17:57as if it were
17:58on Twitter.
18:00The Gulper Eel
18:02This deep-sea eel
18:04has an easily
18:05distended belly
18:06that allows it
18:07to swallow prey
18:08twice its size
18:09in a single monstrous bite.
18:11They have very
18:12unusual jaw shapes
18:13and can reach
18:14about 2-3 feet
18:16in length.
18:18Do you see
18:19that large log
18:20near the ocean floor?
18:22Maybe it's part
18:23of an old ship.
18:24Treasure!
18:24Gold!
18:25Diamonds!
18:26I'm rich!
18:27Well, as you get closer,
18:29you notice something.
18:30It's swimming!
18:31It's not a shark
18:32or a dolphin.
18:33It's a saltwater crocodile!
18:36Now, don't panic.
18:38If you bump
18:39into one of these reptiles
18:40in the sea,
18:41it's unlikely
18:42it'll think of you
18:42as food.
18:44Crocodiles have
18:44a special valve
18:45in their throat
18:46that stops them
18:47from drowning underwater.
18:48But that doesn't mean
18:50they can't bite!
18:52Usually,
18:53they're heading
18:54to a nearby island,
18:55and the quickest way
18:56there is to body surf.
18:58They can't really
18:59take the ferry,
19:00you know.
19:01Watching one
19:01from a distance
19:02should be okay.
19:03Just don't swim
19:05to shore right away.
19:06They love to ambush
19:07their lunch
19:08in shallow water.
19:09If there's one time
19:10I'd want to see
19:11a great white shark,
19:12it's when I'm diving
19:14with crocodiles.
19:15They'll gladly
19:16take a crocodile-sized nibble,
19:18given the right motivation.
19:21The Heikegani crab
19:23lives off the coast of Japan
19:24and has a distinct pattern
19:26on its shell
19:27that looks like
19:28a human face.
19:29More specifically,
19:31the face of an angry samurai,
19:33hence the nickname
19:34the samurai crab.
19:37The scarlet-striped
19:38cleaning shrimp
19:39is a natural hitchhiker.
19:41It stands on the sea floor
19:43and waves its long antennae
19:45for fish and sea animals
19:46to go down
19:47and pick it up.
19:48Then it pays for the ride
19:50by cleaning the host
19:51from bacteria
19:52and plankton.
19:54Sea salves
19:55are often confused
19:56with jellyfish,
19:57although they're closer
19:58to Portuguese man-of-war.
20:00They're very quick
20:01to mature,
20:02growing from newborns
20:03to adults
20:04in less than 48 hours.
20:07The Galapagos Islands
20:08are legendary.
20:10They've got giant tortoises,
20:12blue-footed boobies,
20:14sally-lightfoot crabs,
20:15and red-lipped batfish.
20:17But if you've ever
20:18swum around there,
20:19you might have seen
20:20something really unexpected
20:21in the water.
20:22Iguanas!
20:24Everywhere!
20:25These large marine reptiles
20:27eat the algae
20:27that grow on underwater rocks.
20:29They're strict vegetarians,
20:31I bet the fish
20:32are happy about that.
20:34A long flat tail
20:35designed for swimming
20:36helps them move around,
20:37and sharp claws
20:39keep them on the rocks
20:40for their daily
20:41sunbathing sessions.
20:42But watch them closely.
20:44They sneeze a lot.
20:45They haven't got it cold
20:47or anything.
20:47They're sneezing out salt.
20:49A special gland
20:51keeps the salt
20:52out of their nose,
20:53and they've got to
20:54get rid of it somehow.
20:55Sounds painful.
20:56What's cool is
20:57that they don't mind
20:58us in the water
20:59with them,
21:00because the islands
21:01have been so isolated,
21:03the creatures here
21:04aren't afraid of humans.
21:06Fish can fly, too.
21:08Thanks to their
21:09wing-like fins,
21:10flying fish
21:11can soar a distance
21:12of about 600 feet,
21:14almost as long
21:15as two football fields.
21:17They need flight
21:18to escape from predators.
21:21The skeleton shrimp
21:22could be the stuff
21:23of nightmares
21:24if it wasn't so tiny.
21:26As it is,
21:27it looks like
21:28a stick insect,
21:29but almost
21:30completely transparent.
21:32This creature
21:33looks more like
21:34a fish from a horror movie
21:35than from Earth's oceans.
21:37The sea devil
21:38anglerfish
21:39resides at a
21:40whopping depth
21:41of 3,200 feet
21:42and has no shortage
21:44of weird features.
21:45Razor-sharp teeth,
21:47a misshapen body,
21:48and an unsettling stare.
21:50But perhaps
21:52the creepiest thing
21:53about the sea devil
21:53anglerfish
21:54is the way
21:55it catches its prey.
21:57It has a fishing rod
21:58type appendage
21:59on its forehead
22:00that has a glowing light
22:01attached to the end
22:02to attract animals.
22:04Once these animals
22:05come close enough
22:06to the light,
22:07BAM!
22:08They're captured
22:08by the sea devil's
22:09massive jaws.
22:10These guys are even
22:12capable of eating prey
22:13larger than they are,
22:15so their eyes
22:16aren't bigger
22:17than their stomachs.
22:19Starfish
22:20can cover their prey
22:21with their stomachs
22:22and eat it
22:23outside its body.
22:24Then,
22:25they simply bring
22:26their stomachs
22:27back inside.
22:28Well, that's handy.
22:30Their relatives,
22:32sea cucumbers,
22:33can do the same
22:33party trick,
22:34except that they
22:36leave part of their
22:36guts behind
22:37to scare their attacker.
22:39It's okay,
22:40the missing parts
22:41quickly grow back.
22:43Cockatoo squids,
22:45or glass squids,
22:46are a large genus
22:48whose members
22:48can reach
22:49quite impressive size.
22:50Yet,
22:51one thing they have
22:52in common
22:52is that their bodies
22:53are transparent,
22:55and the internal organs
22:56glow in the dark.
22:59Despite the hairy octopus
23:00looking like it's forgotten
23:02to comb its hair
23:03in the morning,
23:03it's actually its skin
23:05that's sticking
23:05in every direction.
23:07Other sea creatures
23:08have a harder time
23:09realizing where the octopus
23:10itself is this way,
23:12I guess.
23:13The hairy squat lobster
23:15lives in reefs,
23:17hiding from its enemies
23:18and crevices.
23:19If you're lucky
23:20to see it,
23:21you'll instantly notice
23:22the drastic difference
23:23between its whitish hairs
23:25and vibrant pink
23:26and violet claws.
23:28If you step on a sea urchin,
23:31you're gonna know
23:31right away.
23:32Look at those spikes!
23:34While they're not aggressive,
23:36they've got a great defense
23:37going against any creature
23:38that wants to eat them.
23:40Venomous spikes
23:41and a poisonous bite.
23:43Pick your poison, literally.
23:45They live in all the oceans
23:47of the world,
23:47so avoiding them
23:49is out of the question.
23:50They mostly hang out
23:52in shallow water,
23:53hiding in rock pools
23:54and reefs.
23:55So, unmindful people
23:57step on them a lot.
23:59The long venomous spikes
24:00of the urchin
24:01look like needles.
24:02They feel like them too.
24:04They can go in quite deep.
24:06Plus, they release
24:07a strong toxin.
24:08So, what's the cure?
24:10Remove the spikes quickly
24:12and wash with salt water.
24:14Sea turtles
24:16are constantly crying.
24:17They're not sad or anything.
24:19The weeping
24:20is only because
24:21they excrete excess salts
24:23from their body
24:23through their tears.
24:26Boxed jellyfish tentacles
24:27grow up to 10 feet long.
24:29And each tentacle
24:31has 5,000 stinging cells.
24:33Not bad for a creature
24:35that's mostly just water.
24:36Their venom is strong enough
24:38to paralyze anything
24:39they want to eat.
24:41Now, if you happen
24:42to get stung,
24:43it's going to hurt a lot.
24:45Its toxins contain proteins
24:47that affect the heart,
24:48skin cells,
24:49and even our nervous system.
24:51No wonder it's considered
24:53one of the most dangerous
24:54creatures on the planet.
24:56I wouldn't recommend
24:57using sunscreen,
24:58soda, coffee,
24:59or other older methods.
25:01They don't work.
25:02Your best bet
25:03is some good old-fashioned
25:05seawater.
25:06Looks like jellyfish
25:07are the rulers of the ocean,
25:09not sharks.
25:11The margined sea lizard
25:13isn't an actual lizard.
25:15It's a kind of sea slug
25:16that dwells close
25:17to the water surface.
25:18It swims upside down
25:20and somersaults
25:22to get food.
25:22And let's admit,
25:24it looks very cute.
25:27When some foreign object
25:28gets into an oyster's shell,
25:30be it a grain of sand,
25:32a parasite,
25:32or garbage,
25:33the thing irritates
25:35the mollusk's inner walls.
25:37Since the animal
25:38can't spit the item out,
25:39it envelops it
25:40in thin layers
25:41that separate from the body.
25:43These pearlescent layers
25:45accumulate
25:45until they form
25:47a round pearl.
25:48In the past,
25:49people believed
25:50that pearls
25:51were the tears of mermaids.
25:53Now we know
25:54they're just some
25:55decorated debris.
25:57Dolphins have
25:58highly developed communication.
25:59They call each other
26:01by name.
26:02Each dolphin responds
26:03to a specific sound.
26:05Mostly they say,
26:06stop calling me flipper.
26:09The orca
26:10is the largest
26:11of dolphin species.
26:12And they actually
26:14have different cultures.
26:15Two orcas
26:16from different social groups
26:18won't even understand
26:19each other's language.
26:20They're the only animal
26:22known to do this.
26:23I wonder
26:24if they developed
26:24any Google Translate
26:26for dolphins.
26:27The banded shrimp
26:28or banded boxing shrimp
26:30was really aptly named.
26:32It's got bands of color
26:34all over its body
26:35and always stands
26:37in a boxer-like,
26:38ready-to-strike pose.
26:40The brown-lined paper bubble
26:43is another sea slug
26:44and it definitely
26:45looks like one.
26:46It's got a special ability,
26:48though.
26:49It can quickly burrow
26:50holes in the sea floor,
26:51hiding from enemies
26:53inside them.
26:55The snakefish,
26:56as the name implies,
26:58looks a lot like a snake,
26:59but it has a very
27:00distinctive feature.
27:02It can walk
27:03on its fins.
27:04Thanks to this peculiarity,
27:06it easily crawls
27:07from one waterbed
27:08to another,
27:09choosing habitats
27:10more to its liking.
27:12On the way,
27:13a snakefish
27:14can get hungry
27:14for sure,
27:15so it often munches
27:17on small birds
27:18and rodents.
27:19It can grow
27:20quite big, though,
27:21and hunt
27:22even larger animals.
27:23How much weirder
27:24can it get
27:25than to walk
27:25through the woods
27:26and suddenly see
27:27a huge and toothy fish
27:29stalking some rabbit?
27:31The alligator-snapping turtle
27:33catches its prey
27:35by going fishing.
27:36Its tongue
27:37looks like a worm,
27:38and the turtle
27:39waits with its mouth
27:40wide open
27:41at the bottom
27:41of a stream,
27:42lake,
27:43or pond
27:43until some unsuspecting
27:45fish takes the bait.
27:47Then,
27:47snap!
27:48The jaws come together
27:50faster than the blink
27:51of an eye,
27:51and dinner is served.
27:54The mossy jellyfish
27:56is normally invisible
27:57in the dark abyss
27:58where it dwells,
27:59but when exposed
28:00to light,
28:01it will reflect it
28:02and shine beautifully.
28:04The black swallower
28:05might be small,
28:07but make no mistake,
28:08it could easily
28:09gulp down
28:10your favorite puppy.
28:11It can open its mouth
28:12extremely wide,
28:14allowing it to swallow
28:15prey twice its size.
28:18The African tigerfish
28:20will eat whatever it finds,
28:22and given its own size
28:23and that of its monstrous teeth,
28:25you can imagine
28:26it finds a lot of food.
28:28It mostly feeds
28:30on other fish,
28:31but when nutrition is scarce,
28:33it can jump out of the water
28:34and catch both insects
28:36and small birds
28:37right in the middle
28:38of the flight.
28:39It's not so big
28:40as to eat a human,
28:41of course,
28:42but the name
28:43should warn you
28:43that it can easily
28:45take a bite
28:46out of your arm
28:46or leg.
28:48Your brain
28:49controls your arms
28:50and legs,
28:51but with an octopus,
28:53each arm
28:53is actually
28:54kind of independent
28:55with its own
28:56special brain
28:57held together
28:58by a bigger
28:59central brain,
29:00kind of like
29:01the conductor
29:01of an orchestra.
29:03The central brain
29:04sends higher-level
29:05signals to each arm,
29:06saying things like,
29:08move to the left,
29:09there's a crab
29:09behind the corner,
29:10or touch this
29:12silly human's foot,
29:13let's mess with him
29:14a little bit.
29:15No matter how smart
29:17their arms and legs
29:18might be,
29:19an octopus still needs
29:20to look after them
29:21all the time.