Sonar Data (IMAGE)

NOAA National Marine Fisheries Service

Sonar Data

Caption

The bottom-mounted sonars produce high-quality data. This image shows the abundance of pollock as viewed by the upward-looking sonar at a spawning site on March 15th, 2015. The colors in the image represent the strength of sound reflected from fish, with a strong echo from the sea surface visible at the top of the image.

Credit

NOAA

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