Following the success of series 1, explorer, adventurer and marine biologist Monty Halls is once again on his quest to swim with the most magnificent sea creatures in the world.

This time Monty's journey takes him from Canada to Mexico and from Tonga to the Philippines. Each programme is based on a quest that sees Monty investigate a specific story about the target species which in this series include Killer Whales, The Humboldt Squid, Basking Sharks, Hump Back Whales, Thresher Sharks, Beluga Whales, Spinner Dolphins and the Mola Mola Fish.