Clear water is critical to underwater life. Bay grasses need sunlight to grow, and fish need sunlight to see. But what factors cause water clarity to fluctuate? Adam Davis from the Chesapeake Research Consortium explains, and uses a secchi disc to measure water clarity in Spa Creek. Learn more at chesapeakebay.net.

Produced by Matt Rath
Music: "A Moment of Jazz" by Ancelin

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