“…The shell of mollusks with diverse forms and alternative colors has always appealed to consumers and scientists (Comfort, 1950). Shell color of marine mollusks, an obvious and marked genetic-based phenotypic trait, has been proven to be closely related to production traits (Cong et al, 2014;Zhang et al, 2016). Therefore, shell color has been widely applied in the selective breeding project of economic shellfish, such as oysters (Xu et al, 2019;Han et al, 2020), mussels (Innes and Leslie, 1977;Li et al, 2014), scallops (Petersen et al, 2012;Ding et al, 2015), clams (Zhang et al, 2018;Nie et al, 2020), and abalones (Liu et al, 2007;Hoang et al, 2017).…”