Granddad the Lungfish, About 100 Years Old, Euthanized by Aquarium

Granddad the lungfish, who had lived at the aquarium since 1933 and was the oldest captive fish in the world, was in a state of rapidly declining health.

Granddad was the "longest-lived of any fish in a zoological setting in the world", according to the aquarium.

Aquarium officials estimate more than 104 million people saw Granddad over eight decades.

A Shedd spokesman said Granddad's exact age was unknown but that he was believed to be in his mid-90s.

"For a fish who spent much of his time imitating a fallen log, he sparked curiosity, excitement and wonder among guests of all ages who would hear his story", Bridget C. Coughlin, Shedd Aquarium's president and chief executive officer, told AP.

Shedd Aquarium  Brenna Hernandez                    Granddad had a lot of fans
Shedd Aquarium Brenna Hernandez Granddad had a lot of fans

Granddad, according to Shedd's blog, "was the last standing (or swimming) among Chicago's beloved trio of ancient animals, which also included a dwarf African crocodile, R1, who lived at Lincoln Park Zoo from 1930 to 2010, and Brookfield Zoo's 83-year-old Major Mitchell's cockatoo, Cookie, who died in August of last year".

Granddad, as the 11-kilogram fish was known, was euthanased due to old age at the Chicago Shedd Aquarium after losing interest in food and showing signs of organ failure.

It was at that same party that the aquarium reckons Granddad had his fanciest-ever meal: a layered cake "filled with smelt, shrimp, yellow squash, carrots, potatoes, and green peas, decorated with seaweed, esca-role and silversides".

The aquarium shared the sad news on their Facebook page. Sattler, who has provided care for Granddad for more than 15 years, said he will be missed. But if you haven't been to the Shedd in a while, check out these photos of the aquarium's favorite fish. In Australia, they are a protected species.

  • Tracy Ferguson