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In this brand new four-part series, an amazing new generation of spy creatures set out to explore the ocean, encountering the ingenious and emotional animals that have made this habitat their home.

The first episode sees the spies search for intelligent life and mind-boggling ways of thinking. The largest and most ambitious spy creature ever built has a close encounter with the owners of the largest brains on the planet: sperm whales.

Spy whale is the same size as a newborn whale calf and can swim and dive like the real thing. It is also equipped with an array of specialist cameras and a hydrophone that can capture their calls. To reveal the greatest mind in the invertebrate world, spy octopus builds a relationship with a coconut octopus, a creature who not only a central brain but also a brain in each of its arms.

In the Caribbean, spy hermit crab loses its camera shell to a real hermit crab during a house swap. The thief becomes an unwitting camera operator and gains a crab’s-eye view as the crabs line up to exchange shells in order of size.

Spy In The Ocean is coming soon to BBC One.

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