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Lake trout otolith section

By Alaska Science Center
Cross section of a lake trout otolith collected from a fish. Otoliths, also known as 'earstones."
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Detailed Description

Cross section of a lake trout (Salvelinus namaycush) otolith collected from a fish in Lake Clark National Park. Otoliths, also known as 'earstones' are hard, calcium carbonate structures located directly behind the brain of bony fishes. 

Sources/Usage

Public Domain.

U.S. Geological Survey