The spade-toothed beaked whale is rarest of whales . Scientists only had partial skeletal remains of the species before . An adult female and juvenile male washed up on a New Zealand beach in 2010 . Hide Caption
The spade-toothed beaked whale is rarest of whales . Scientists only had partial skeletal remains of the species before . An adult female and juvenile male washed up on a New Zealand beach in 2010 . Only months later did researches know what they had .