Tide Pool Under Ultraviolet Light, Fidalgo Head, Washington

Rockweed, algae, snails, and other tide pool inhabitants appear in vibrant colors when exposed to ultraviolet light at low tide off Fidalgo Head near Anacortes, Washington. The color shift is fluorescence, a type of photoluminescence, in which certain chemicals absorb light that is invisible to human eyes and emit some of it at a different wavelength that we can see. This scene was captured under black light at Sunset Beach in Washington Park.

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Filename: BlackLight_Low-Tide_Tide-Pool_Fidalgo-Head_3575.jpg
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Image Size: 8192x5464 / 43.5MB; ultraviolet ultraviolet light blacklight black light fluoresce fluorescence photoluminescence phosphor phosphors low tide tide beach Washington WA nature psychedelic red Rosario Strait Anacortes Fidalgo Island Fidalgo Head night tide pool pool rockweed algae marine snail snails water plant plants vegetation
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Rockweed, algae, snails, and other tide pool inhabitants appear in vibrant colors when exposed to ultraviolet light at low tide off Fidalgo Head near Anacortes, Washington. The color shift is fluorescence, a type of photoluminescence, in which certain chemicals absorb light that is invisible to human eyes and emit some of it at a different wavelength that we can see. This scene was captured under black light at Sunset Beach in Washington Park.