In Ask An Ocean Explorer marine biologist of over 20 years and advisor for the BBC's Blue Planet II, Dr Jon Copley, explains the science and wonder of the deep ocean. Combining untold history of ocean exploration and personal account of what it's like to be a 'bathynaut' diving in a mini-submarine, Ask An Ocean Explorer will bring to light weird and wonderful deep-sea creatures that we find down there and how the oceans and their health is connected to our everyday lives.