In 2019, it was discovered that the Bigmouth Buffalo fish was the world’s longest-lived freshwater fish, surviving to an age of at least 127 years old.

But, this wasn’t the most incredible thing that the researchers discovered. The fish actually appears to be aging backwards!

Dr. Alec Lackmann is Assistant Professor in the Department of Biology at the University of Minnesota Duluth, and joins Seán to discuss.

Image: National Geographic