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. Fred Buyle, a record-breaking free diver, travels the world to tag or photo-identify these immense and mysterious marine creatures.

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. Fred Buyle, a record-breaking free diver, travels the world to tag or photo-identify these immense and mysterious marine creatures.