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circular, light-colored disk appears on the surface of the water, surrounded by a larger dark area of indeterminate shape. After the formation of these colored disks on the water, a pattern of light- and dark-colored spiral bands develops from the dark spot on the water surface. Then, a dense annulus of sea spray, called a "cascade", appears around the dark spot with what appears to be an eye. Eventually, the waterspout becomes a visible funnel from the water surface

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