A 38-foot-long (11.5 meters) whale that washed ashore in the Florida Everglades in January 2019 turns out to be a completely new species. And it's already considered endangered, scientists say.
When the corpse of the behemoth washed up along Sandy Key - underweight with a hard piece of plastic in its gut - scientists thought it was a subspecies of the Bryde's (pronounced "broodus") whale, a baleen whale species in the same group that includeshumpbackandblue whales. That subspecies was named Rice's whale.
Now, after genetic analysis of other Rice's whales along with an examination of the skull from the Everglades whale, researchers think that, rather than a subspecies, the Rice's whale is an entirely new species that lives in the Gulf of Mexico.
The discovery, detailed January 10 in the journalMarine Mammal Science, also means that there are fewer than 100 members of this species living on the planet, making them "critically endangered," according to astatementfrom the National Oceanic and Atmospheric Administration (NOAA).
Related:Amazing new video shows baby humpback whales nursing from their moms
According to the study, the researchers looked at records of the Bryde's whale in the Caribbean and greater Atlantic Ocean and concluded the whales they spotted were evidence "of an undescribed species of Balaenoptera from the Gulf of Mexico."
The lead study author Patricia Rosel and her co-author, Lynsey Wilcox, both at Southeast Fisheries Science Center, completed the first genetic tests of this whale in 2008, finding that the skull of the Rice's whale was different than that of Bryde's whales.
In addition to having different skulls, Rice's whales are slightly different in size than Bryde's whales, the new analysis showed. They can weigh up to 60,000 pounds (27,215 kilograms) and grow up to 42 feet (12.8 meters) long, according to NOAA, whereas Bryde's whales have been known to reach upwards of 50 feet (15.2 m) and weigh more than 55,000 pounds (24,947 kg).
Rosel and her colleagues think the whales in the new species can live approximately 60 years, but given that there are so few in existence, researchers need further observation of the whales to get a better idea of their life expectancy.
Given their location in the Gulf of Mexico, Rice's whales are particularly vulnerable to oil spills, vessel strikes and energy exploration and production, NOAA added.
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This article was originally published by Live Science. Read the original article here.
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Whale That Washed Up on Florida Beach Turns Out to Be an Entirely New Species - ScienceAlert
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