They live in deep ocean, have to come up to breath, swim with an unfishlike stroke which is pedestrian in the fish world, seem to be easy meat for sharks (the head and legs are not retractable) and yet can live for 80 years. And when they are on a beach laying eggs appear indifferent to threats, e.g. from television crews. They are under threat as a species now, but who would have thought an animal such as this would have survived 100 million years

Comment