Rarest Whale Seen For the First Time

By: Jennifer Viegas, DiscoveryNews Email
By: Jennifer Viegas, DiscoveryNews Email

The world's rarest whale, previously only known from a few bones, was seen for the first time on a New Zealand beach, according to a new Current Biology paper.

The elusive marine mammal is the spade-toothed beaked whale (Mesoplodon traversii). The good news is that it was seen at all, revealing that it still exists. The bad news is that the sighting was of a mother and her male calf, both of which became stranded and died on the beach.

"This is the first time this species -- a whale over five meters (about 16.5 feet) in length -- has ever been seen as a complete specimen, and we were lucky enough to find two of them," Rochelle Constantine of the University of Auckland said in a press release. "Up until now, all we have known about the spade-toothed beaked whale was from three partial skulls collected from New Zealand and Chile over a 140-year period. It is remarkable that we know almost nothing about such a large mammal."

The discovery actually happened two years ago, when the whales live-stranded and died on Opape Beach, New Zealand. It's only after DNA analysis that the identification of the rare species was made. At first, they were incorrectly identified as being the much more common Gray's beaked whales.

"When these specimens came to our lab, we extracted the DNA as we usually do for samples like these, and we were very surprised to find that they were spade-toothed beaked whales," Constantine said. "We ran the samples a few times to make sure before we told everyone."

Constantine suspects that the whales "are simply an offshore species that lives and dies in the deep ocean waters and only rarely wash ashore. New Zealand is surrounded by massive oceans. There is a lot of marine life that remains unknown to us."

Read more here at DiscoveryNews.


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