We know more about the surface of the moon than we do the deep oceans, yet the sea covers two-thirds of our planet. David Attenborough narrates this definitive exploration of the marine world, from the familiar to the unknown, revealing the sea and its communities at their most fearsome and alluring. Five years in the making, this epic series chronicles the mysterious habitants of the open oceans, filming animal behaviours never before caught on camera as well as the more familiar coastlines and coral reefs.
