Underwater organisms of the Lembeh Strait – Wallace Line, #02, 램베해협의 수중 생명체
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Underwater organisms of the Lembeh Strait – Wallace Line, #02, 램베해협의 수중 생명체


The earth’s changes are perceived by
the many earthquakes and volcanic eruptions in the circum-Pacific orogenic zone.Indonesia
Indonesia, comprised of many islands,
is located in that zone.Lembeh StraitNarrated by Hong Gyeong-min
This narrow strait between the islands
is Indonesia’s Lembeh Strait. It’s the most mystical
underwater kingdom in the world. We’ve decided to visit
the Lembeh kingdom with Pacific ecology expert
Dr. Myeong Jong-guk. 10m underwater, the Lembeh is an underwater desert
made of volcanic ground. In a short while,
Lembeh will show its true colorsMantis Shrimp
that are hidden behind
the desolate scenery. The mantis shrimp snatches
its prey immediately. A fish camouflages itself
in the underwater desert.Painted Frogfish
It disguises its body color and size
like the nearby rock. It’s the painted frogfish. The lionfish boasts its magnificent fin. It fell for the painted
frogfish’s disguise. Mistaking the painted frogfish for a rock,
the lionfish tries to rest underneath it. It ends up being eaten
by the painted frogfish. Even a predator like
the painted frogfish needs patience in order to survive in
the underground desert. Even a small water plant is
a great hiding place for the fish.Banggai Cardinalfish
The Banggai cardinalfish live in groups,
away from its predators.Young Ribbon Eel
The ribbon eel is lying in ambush
for the Banggai cardinalfish. It waits for a Banggai cardinalfish
to leave the group and snatches them
when they’re nearby. The ribbon eel hunts
while hiding its body in the sand and it can hunt within 1 meter. Once the food comes
within its reach, it sticks out its long body
like a spring and preys upon it.Male Ribbon Eel
The ribbon eel can change its sex. The male ribbon eel is blue. After it grows to be
about 1 meter long,Female Ribbon Eel
its body turns into a golden color
and becomes a female. The golden female can grow up
to 1m 30cm. Females are hard to find
because they only live as females for about a month. The sea organisms of the barren Lembeh
adapt and survive in various ways.Mimic Octopus The mimic octopus is
a master of disguise. Upon arriving near the water plants,
it bends and curls its arms and turns into a water plant. It can even mimic a flatfish.Flatfish It pushes its arms back
and flattens itself like the flatfish. This looks like a starfish,
but it’s actually a mimic octopus. The mimic octopus can freely
change its body shape and color to accompany the fish
that comes nearby. When a predator appears,
it mimics a venomous organism. When it’s preying on another organism,
it mimics a weak organism. Species that can change its shape or color
have a better chance of survival. The cuttlefish is a master of disguise
as well. In a place filled with sea anemone,Cuttlefish
it changes its body shape and color
to blend in. The cuttlefish changes itself
in less than a second. Isn’t that amazing?Shape-shifting Cuttlefish
There’s even a cuttlefish
that walks like a rhinoceros. It does this
in order to look threatening. The swift hunter suddenly
changes its body.Balloon Fish
Its predator,
the balloon fish has shown up. The cuttlefish disguises itself
as a venomous nudibranch in order to save itself from the danger.Octopus
This is an octopus disguised
as a water plant. The octopus loves to feed
on crustaceans such as crabs. The crab pretends to be dead, but it’s not enough to escape
from the persistent octopus. Some crabs carry jellyfish on their back
in order to hide from the octopus. In order to survive
in the sea of Lembeh, they have evolved to carry
the venomous jellyfish on its back. This is a boxing crab,
carrying sea anemones on its claws like boxing gloves. The sea urchin habitat is like an oasis
in the underwater desert because its venomous spines
keep the predators away.Crocodile Flathead
It’s the large crocodile flathead
with its protruded iris. The crocodile flathead evolved
to look like the crocodile in order to adapt to
the underwater desert of Lembeh. It hides itself by camouflaging. You never know when you’ll
run into a predator in the ocean. If you don’t have a weapon
to defend yourself,Jawfish
you need to find a safe place to hide. This is a male jawfish,
digging a hideout cave inside the sand. The frogfish is after the female jawfish. But it can’t beat the female
jawfish’s resistance. The female jawfish escapes
the frogfish safely. It will mate and spawn in the safe home
that the male provided.Mantis Shrimp The organisms of the Lembeh Strait
have changed their appearances over a long period of time
in order to survive. The struggle for survival has resulted in
brilliant disguise in the underwater desert. The submerged rocks
of the Lembeh StraitElectric Flame Scallop
are home to clams that have evolved
in the most extraordinary way. The electric flame scallop reveals
its white skin and charges white flames. Even the strongest predator
must stay away unless it wants to be electrocuted.Giant Clam
The giant clam weighs about 200kg. Big and strong enough
to swallow humans, it is called the “man-eating clam.” Some species have evolved
by getting rid of their shells and adapting colorful venom.Nudibranch
It’s the nudibranch. The nudibranch’s beautiful pattern
is a warning that it will spit venom
if you touch it. Their ancestors had shells. But at one point,
they got rid of their heavy shells and ate poisonous coral polyp
to store poison in its body.Blue Dragon Nudibranch
The blue dragon nudibranch is
the only solar-powered nudibranch. The blue dragon nudibranch is
mating to pass on its genes. The Lembeh Strait
is a primitive kingdom that has evolved into various
forms for generations.Dr. Myeong Jeong-gu
Korea Ocean Research & Development Institute

It’s a small strait in a tropical sea, but in an ecological viewpoint, we can see that
they have struggled to survive. It’s more than just
a beautiful underwater world. I think it is scholarly significant
to question why they had to evolve like that.

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