https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/4022729
Black scallop shell.
Many scallops are highly prized as a food source; the name "scallop" is also applied to the meat of these animals when it is used as seafood. The brightly colored, fan-shaped shells of some scallops, with their radiating, fluted patterns, are valued by shell collectors, and have been used since ancient times as motifs in art and design. Original public domain image from Flickr
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