Robot Spy Crab follows a peacock mantis shrimp in search of a meal but being disguised as a crab may not be the best choice!!! Clip taken from episode 4 'Deep Trouble' of our series Spy in the Ocean. Spy in the Ocean is available on iPlayer in the UK: https://www.bbc.co.uk/iplayer/episode/m001n9qd/spy-in-the-ocean-series-1-4-deep-trouble and on PBS in the US: https://www.pbs.org/wnet/nature/episodes/ This final episode explores the challenges ocean life must overcome to survive. On the island of South Georgia, a version of the first Spy Camera ever made makes a triumphant return. This new Bouldercam dodges eight tonnes of colliding blubber as male elephant seals fight off rivals. In the chaos, an elephant seal pup is separated and his survival depends on finding his mother. Bouldercam is with him all the way as he fights off skuas and other dangers. Spy Crab meets the infamous peacock mantis shrimp and soon finds itself on the receiving end of the strongest punch in nature, a knockout blow faster than a speeding bullet. In the Galapagos, Spy Seal does its best to keep up with a lonesome sea lion as it chases tuna, one of the fastest fish in the ocean. Not only must he catch this enormous fish alone, he must do it while fighting off hungry sharks. In the hidden depths of the Californian coast, there are fish that must be seen to be believed. Alien-like sarcastic fringehead use their outsized gaping mouths to ward of rivals. Spy Fringehead is soon caught in the brawl, but its open mouth reveals a camera, one that captures a fish-eye’s view of the threat it faces. Off the coast of British Columbia, huge herring shoals face even greater trouble as they head to their spawning grounds. Spy Herring eavesdrops on the strange sounds produced by flatulent herring as they guide others to the spot. Our Spy slips into the shoal as they attempt to dodge marauding sea lions and the diving scoter ducks that are after their eggs. Life on the beach isn’t always the paradise it’s cracked up to be. When hermit crabs gather to swap their shells, things can go very wrong, very quickly. When a crab loses its shell it has to think on its feet. Its solution is inventive - the lid of some suntan lotion provides a temporary refuge from predatory birds. Our Spies are not immune to trouble themselves. When Spy Pelican films the spectacular spawning of grunion fish as thousands emerge from the sea to spawn on the beach, it takes a catastrophic plunge into the surf, leaving Spy Crab to takeover filming duties. Spy Iguana is also in trouble when it tries to film iguanas gallantly battling the stormy sea. Despite its best efforts it is soon washed away. When the same happens to Spy Octopus, all is not lost. It’s rescued from the storm surges by its old friend, the coconut octopus. On their many adventures across the series, our Spy Creatures travelled the globe to reveal the extraordinary intelligence, surprising emotions and complex social lives possessed by ocean life. On the way, they shed light on the mysteries of the deep as never before. Narrated by David Tennant Music by Will Gregory Directed by John Downer #MantisShrimp #Crab #DavidTennant