Blue Planet 2: Attenborough defends shots filmed in studio

Most filming done in the wild – including armoured octopuses and hypnotic cuttlefish – but some crucial behaviour had to be captured in lab conditionsFootage of captive wildlife inserted into the BBC’s Blue Planet 2 series remains “totally true to nature”, according to the makers of the flagship show that reveals new insights into life in the oceans.An octopus that armours itself with shells and rocks, fish that use sign language and tools and dazzling cuttlefish th