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H-Mount Under Ice

A very short Lamprey run is observed in the Yukon River. They migrate close to shore and near the bottom surface of the ice. A rugged sonar site to monitor the run is set up three miles below Grayling, Alaska.
H-Mount Under Ice


THIS IMAGE WAS CAPTURED BY OR FEATURES A SOUND METRICS IMAGING SONAR

Courtesy of Bruce McIntosh, Alaska Department of Fish & Game

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