This curated collection provides high-quality images of ageing structures from fish of verified age. Browse by species to explore otoliths, scales, fin spines, and other structures commonly used in age determination. These images offer a visual reference for researchers, fisheries managers, and students seeking comparative examples to support accurate and consistent age estimation.
If you would like to contribute known-age fish structures, please contact us!
Blue Catfish
Channel Catfish
Kokanee Salmon
Lake Sturgeon
Lake Trout
Largemouth Bass
Muskellunge
Walleye
White Bass
