Skip to main content
U.S. flag

An official website of the United States government

A scientist examines the teeth and skull of a sea otter

Detailed Description

A scientist examines the teeth from a sea otter skull found on a beach at Katmai Nation Park and Preserve. Teeth are collected in the field and each sea otter is aged using cementum annuli counts. Cementum annuli are the rings of collagen fibers in tooth roots.

Sources/Usage

Public Domain.

Was this page helpful?