Abstract The harvesting of sea silk, a luxurious golden textile traditionally obtained from the endangered mollusk Pinna nobilis, faces severe limitations due to conservation efforts, driving the search for sustainable alternatives. Atrina pectinata , a phylogenetically close relative within the Pinnidae family is identified, as a viable source of biomimetic sea silk. The byssal threads of A. pectinata can be processed using existing methods, providing a way to continue producing this historically significant text…