Speed Kills: Ocean
Saturday, 7.30pm, Nat Geo Wild The fastest animals on the planet use speed to kill, so in this spectacular natural history series, high-speed cameras and a detailed knowledge of anatomy combine to show us how they do it in magnificent and sometimes chilling detail. In the coming weeks we’ll see the fastest creatures in the episodes Savannah and Jungle, but tonight’s debut episode, Ocean, is all about things that go fast in the sea. Ocean creatures combine hydrodynamic design with stealth and subterfuge. Did you know that fish have a swim bladder? This inflatable air sac provides buoyancy so the fish can use all its muscle power for propulsion. And what about those sensors along the bodies of sharks, so sensitive they can detect individual fish in a school, or the teeth-like interlocking structures on their skins that mean water just slides off. A treasure trove of all the fascinating and mostly unknown skills and design features that make sea creatures fearsome as well as mindbogglingly fast.