We're familiar with the surface hunters; stranger giants thrive far below, in no sunlight, pitch black. [Music]

Like the back of an alien planet, at depths of five thousand feet, the pressure can kill—more than two thousand pounds per square

inch. Yet there is life here. A sub crew sets out bait; hungry little sharks show up at the edge of the light.

One of the world's biggest and oldest killer sharks, a bluntnose sixgill, attacks the bait. [Music]

Big as a great white, up to 16 feet long. Not a lot of fresh kill 5,000 feet down.

The sixgill is a holdover from another era, a 200-million-year-old engine that keeps on trucking.

An extra pair of gills and six rows of razor teeth—enough to take a chunk out of a whale.

[Music] This shark may look slow, but when it's hungry [Music] it's fast enough. There's power in that long tail.

Everywhere you turn is the domain of an unexpected, bizarre ocean predator. Nighttime in the abyss: the largest migration on Earth begins.

[Music] Countless creatures rise to the surface to feed. [Music] Including a monster from far below.

Enormous; a mouth big enough to engulf a human. This epic journey begins with tiny plankton.

[Applause] The megamouth is a mysterious, ancient giant, seen fewer than 100 times.

Only discovered in 1976. What we do know: it grows to over 20 feet long, a filter feeder,

like whale and basking sharks, except the megamouth lives much deeper down—to 15,000 feet during the day.

That weirdly shimmering skin is a secret weapon to engulf its favorite prey: krill and plankton, lured by the

bioluminescent glow, which it swallows with its tongue. [Music] You

2억년 간 거의 목격된 적 없는 베일에 쌓인 심해의 고대 상어

내셔널지오그래픽 공식 유튜브 채널입니다


내셔널지오그래픽 - National Geographic Korea

심해의 거대 상어, 6gill 상어 소개

5000피트 심해의 극한 환경 (엄청난 수압)

6gill 상어의 특징: 큰 몸집, 날카로운 이빨

2억년 된 고대 상어, 6gill 상어의 생존

심해 생물의 대이동과 메가마우스 상어

심해에서 표면으로의 대규모 이동

거대한 메가마우스 상어 등장, 사람을 삼킬 수 있는 입 크기

1976년 발견된 희귀 상어, 100번 미만 목격

메가마우스 상어의 특징과 생태

특수한 피부와 생물 발광을 이용한 먹이 사냥 (크릴, 플랑크톤)