 The world's rarest whale species may have washed up on New Zealand's beach this month. Scientists there now examining the spade-toothed whale in hopes of shedding new information about the mysterious creatures. If DNA confirms what washed up on a South Island beach, it will be the only, rather the seventh ever found, all but one, off the shores of New Zealand. No one knows how many there are or even where they live in the vast southern Pacific Ocean.