Wild Ohio - Division of Wildlife presents How to Age a Fish.
Join ODNR Fisheries Biologists as they explain how to use scales and otoliths (ear bones) to determine the age of different fish species.
Many Ohio anglers want full stringers before they head home. However, some just want to fish for “the big one.” Either way, the age of the fish provides vital information to biologists. But how do they know how old a fish is?