A Secchi disc being lowered into clear water
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Dr Renee Gruber (Australian Institute of Marine Science), Australian Institute of Marine Science
Dr Renee Gruber (Australian Institute of Marine Science), Australian Institute of Marine Science
Description
A Secchi disc with alternating black and white quarters is lowered into clear water in the Great Barrier Reef Marine Park during sampling for the GBR Marine Monitoring Program, February 2019. Secchi discs are a simple and reliable way to measure the depth to which light penetrates the water.