A lake trout that hatched when JFK was president was found alive in Lake Superior

Meet Grandma Mary Catherine, the oldest known Great Lakes trout

She's 20 years older than the last Lake Superior record holder, and tells a Lake Superior story.

62-year-old fish caught in Lake Superior thought to be oldest-ever lake trout found in Great Lakes

Researchers say that a lake trout recently captured in Lake Superior is believed to be the oldest-known specimen of its species ever caught in the Great Lakes, estimated to be 62 years old.

Lake Trout Caught In Lake Superior Is Oldest Ever, Over Double the Average Lifespan Of A Laker

oldest lake trout ever Mary Katherine caught on Lake Superior A lake trout caught in Lake Superior was tested by the Michigan DNR and discovered to be the oldest specimen on record. The average lifespan of a laker is 25-30 years and this fish was over double that age. To put this exceptional fish in context, this lake trout was so old it spanned 12 presidential elections and was alive during JFK’s time in office, according to MLive. 62-Year-Old …

A lake trout that hatched when JFK was president was found alive in Lake Superior

The oldest known lake trout in the Great Lakes was recently documented by researchers at the Michigan Department of Natural Resources.

Meet Mary Catherine, the Great Lakes oldest-ever lake trout

The best way to measure how old a fish is is by counting the number of rings formed on a chunk of calcium living in its inner ear. This lake trout, named Mary Catherine, had 62 rings.

Oldest-ever Great Lakes lake trout recorded in Lake Superior - Great Lakes Commission

A 62-year-old lake trout named Mary Catherine was found in 2023 on the reefs of a remote island in the middle of Lake Superior. While lake trout can live for decades, the discovery of a fish this old is unusual. Read the full story by WJBK-TV – Detroit, Michigan.