Traveling to the Ocean Floor
In Traveling to the Ocean Floor, narrator Sir David Attenborough explains how the environment changes as a submersible descends into the ocean. Learn how the ocean environment changes as you travel deeper. This video is excerpted from BBC’s Blue Planet, a definitive documentary series diving into the mysterious depths of the sea to discover the natural history of the world’s oceans and the rarely seen marine life that reside there.
Lesson Express
Q: What is “marine snow”?
A: “Marine snow” is pieces of dead animals and plants that drift down from above.
Q: What clues of life are there on the seafloor?
A: There are tracks and trails in the sand.
Q: Why is the water so clear in the deep waters?
A: The water is clear because there’s so little organic matter that makes it that far down.
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In Subtle Signs of Life on the Seafloor, narrator David Attenborough journeys over two miles beneath the ocean's surface, where the pressure is immense — 300 times greater than at sea level. Here, marine snow, tiny organic particles drifting from above, slowly settles on the seafloor over months. This vast, flat expanse stretches for thousands of miles, with subtle signs of life visible in the soft sediment. Sea urchins sift through the accumulating snow, while shrimp carefully pick out edible particles. The monkfish, nearly indistinguishable from the sand, patiently waits for prey to be lured toward its deceptive trap, sometimes going days between meals. This video is excerpted from BBC’s Planet Earth, a breathtaking documentary series that highlights the natural wonders of our planet.
In Strange Creatures at 500 Meters Below, narrator David Attenborough explains how plankton retreats into the ocean depths as the Sun rises. To follow it, we descend in a submarine where pressure increases, and temperatures drop. At 500 meters (1,640 feet) below, strange creatures emerge. Organic particles, known as marine snow, drift down, serving as food for many animals like the sea spider, which uses feathered leg-like appendages to capture it. Meanwhile, the sawtooth eel waits motionless, ready to strike at silhouetted prey swimming near the faint glow from the surface. This video is excerpted from BBC’s Planet Earth, a breathtaking documentary series that highlights the natural wonders of our planet.
In Subtle Signs of Life on the Seafloor, narrator David Attenborough journeys over two miles beneath the ocean's surface, where the pressure is immense — 300 times greater than at sea level. Here, marine snow, tiny organic particles drifting from above, slowly settles on the seafloor over months. This vast, flat expanse stretches for thousands of miles, with subtle signs of life visible in the soft sediment. Sea urchins sift through the accumulating snow, while shrimp carefully pick out edible particles. The monkfish, nearly indistinguishable from the sand, patiently waits for prey to be lured toward its deceptive trap, sometimes going days between meals. This video is excerpted from BBC’s Planet Earth, a breathtaking documentary series that highlights the natural wonders of our planet.
In Strange Creatures at 500 Meters Below, narrator David Attenborough explains how plankton retreats into the ocean depths as the Sun rises. To follow it, we descend in a submarine where pressure increases, and temperatures drop. At 500 meters (1,640 feet) below, strange creatures emerge. Organic particles, known as marine snow, drift down, serving as food for many animals like the sea spider, which uses feathered leg-like appendages to capture it. Meanwhile, the sawtooth eel waits motionless, ready to strike at silhouetted prey swimming near the faint glow from the surface. This video is excerpted from BBC’s Planet Earth, a breathtaking documentary series that highlights the natural wonders of our planet.