Blue planet II. Episode 3, Coral reefs / narrated by David Attenborough ; producer, Jonathan Smith ; series producer, Mark Brownlow ; a BBC Studios Natural History Unit production ; a co-production with BBC America, Tencent, WDR, France Televisions and CCTV9.
Crazy, colourful, vibrant. The reefs are like a mad metropolis. How do you get ahead in the most crowded place in the ocean?
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