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Quick answer：The color of a crayfish shell is red due to the presence of carotenoid pigments. This color is common in many crustaceans and serves as a form of camouflage and sexual selection in the natural environment.
Quick answer：The color of a crayfish shell is red due to the presence of carotenoid pigments. This color is common in many crustaceans and serves as a form of camouflage and sexual selection in the natural environment.