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You can stream The Blue Planet (2001) on Discovery + with a subscription.

Sir David Attenborough narrates this critically acclaimed series that dives deep into the marine environment of Planet Earth. Although two-thirds of the world's surface is covered with water, scientists know less about the oceans than they do about the surface of the moon. This limited series travels from various coasts to the poles to examine watery denizens ranging from the gigantic blue whale to microscopic coral polyps.

Submerged in a hypnotic, rhythmic world of deep-sea blues, this series captures the alien splendor of the ocean floor. David Attenborough guides you through silent, shimmering landscapes that feel more like another planet than home.

Trailer