An Australian lungfish that entranced visitors to Chicago's Shedd Aquarium for more than 80 years has been euthanized due to old age, the popular tourist attraction announced Monday. A necropsy — or animal autopsy — found conditions consistent with old age, aquarium officials said. The aquarium acquired him from the Sydney Aquarium in Australia during a 1933 collecting expedition and Granddad was one of two lungfish that attracted visitors during that year's A Century of Progress International Exposition in Chicago. Aquarium officials estimate more than 104 million people saw Granddad over eight decades. The species has existed for more than 380 million years and has not changed for 100 million years, according to the aquarium.

Source: ABC News February 06, 2017 18:33 UTC