A Sea of Doom Beneath the Pacific
In A Sea of Doom Beneath the Pacific, narrator Sir David Attenborough investigates the world of the deep ocean, where only a small amount of light shines and animals have evolved in interesting ways. This video is excerpted from BBC’s Blue Planet II, a natural history series that explores the world's oceans, the animals that live in them, and the threats they face, using modern filming techniques and equipment to capture previously unseen areas of the ocean.
Dive into an enchanting marine odyssey once more as this striking cinematic journey returns to explore our planet's oceans with renewed magic and wonder. Learn more.
Lesson Express
Q: How far down in the part of the ocean described as the twilight zone?
A: It is 656 feet (200 meters) underwater.
Q: How has the swordfish adapted to living in darkness?
A: Its eyes are larger.
Q: How has the barreleye fish adapted to living in darkness?
A: It has a transparent head that it can look through.
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