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The largest creatures on Earth live underwater. Their sheer size has always triggered our imagination.  In murky waters or inaccessible places, we ignored their true nature and created legends.

Today, scientists try to understand them, to go beyond the myths. But stranded or fished creatures offer a poor glimpse into their world. So how can we decipher their underwater secrets without altering their behaviour?

Meet Fred Buyle, a record-breaking freediver who has dedicated his life to this non-intrusive quest. For science, he travels the world to tag or photo-identify large marine creatures that have populated his imaginary world since he was a child.

Details: 104′ 70′ and 2 x 52′ 4K HDR HD
Directed by: Bertrand LOYER