Planet Earth: Blue Planet II

S1, E3

Behind the Scenes: Deep-Sea Reefs

The 'Blue Planet II' crew finds vulnerable coral reefs at six thousand meters deep.

Video Extra

The Ocean's Master of Disguise

Meet the ocean's most incredible master of disguise: the cuttlefish. Don't miss all-new episodes of 'Blue Planet II', Saturdays at 9/8c on BBC America.

Trailer: Coral Reefs

Visit bustling underwater cities crammed full of life on the next 'Blue Planet II,' Saturday at 9/8c on BBC America.

Behind the Scenes: Deep-Sea Reefs

The 'Blue Planet II' crew finds vulnerable coral reefs at six thousand meters deep.

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