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Sign indicating optical effect of viewing objects underwater

Image

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https://www.noaa.gov/media/digital-library-photo/pl23fish9643jpg

Description

Sign indicating optical effect of viewing objects underwater (Image credit: National Park Service; NOAA Central Library Historical Fisheries Collection | M. Woodbridge Williams)

Credit

National Park Service; NOAA Central Library Historical Fisheries Collection

Photographer

M. Woodbridge Williams

Location

U.S. Virgin Islands, Buck Island