Mysterious Shark Lives Hundreds of Years, Scientists Say

A team of international researchers using special technology says it has found that Greenland Sharks can live as long as 500 years, making this type of shark the longest-lived vertebrate known on Earth. WSJ's Monika Auger reports. Photo: Julius Nielsen

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If they are accidentally caught by commercial fisherman, they need to be released alive, otherwise harsh penalties need to be enforced.