The Big Blue Live team heads up the food chain towards the world's most iconic marine predator, the great white shark. Reports suggest that this year their numbers in Californian waters are higher than ever before. The team wants to know why, and what this might mean for the sea lions and other wildlife that is also returning.

Join Matt Baker, Liz Bonnin, Steve Backshall and Hugh Fearnley-Whittingstall as they dive deeper into the greatest gathering of marine wildlife on the planet.