Here it is, the first video ever of one of the most elusive large mammals on the planet. Tasmacetus shepherdi was thought to be solitary, but a team studying blue whales off Australia happened across a pod of 10-12. A great stroke of luck for science. So we have this very big, visually distinctive animal that moves in pods - and a pod had never even been reported before. It's a good reminder just how vast the oceans are. What else might still be eluding us?