08/15/2025
These fish can grow very old and have very slow growth rates. Our handling, techniques, and catch and release do make a difference!
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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.
It's the oldest lake trout ever found in the Great Lakes.
Read more: bit.ly/3Uv9C7M