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Violet is the color of light at the short wavelength end of the visible spectrum, between blue and invisible ultraviolet. It is one of the seven colors that Isaac Newton labeled when dividing the spectrum of visible light in 1672. Violet light has a wavelength between approximately 380 and 435 nanometers. The color's name is derived from the violet flower.
The feathery strands at the back of this dorid nudibranch (Chromodoris willani) are no mere adornment: they’re its gills! There is also a pair of antennae up front. This species, found in Western Pacific Ocean coral reefs, ranges from dark purple to bright white.
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