A new study has shed light on the lifespan of lake sturgeon in the Great Lakes. These fish are already known to live over 100 years, but the study suggests some may live more than 400 years. The study was published by the Michigan Department of Natural Resources and several universities.

Researchers estimate the age of fish by examining structures such as fin spines or otoliths, which show annual growth rings similar to trees. Further details on the study's findings are available from the Michigan Department of Natural Resources, including an article titled "Long live the sturgeon" by the DNR Marquette Fisheries Research Station Manager and a communications specialist.