In other species:

Mendelian trait/disorder: yes

Mode of inheritance: Autosomal Co-Dominant

Considered a defect: no

Key variant known: no

Inheritance: From the results of strategic crosses, Ky et al. (2016) concluded that the segregation of shell colour is consistent with a single-locus "two-allele model for flesh trait, whereby the orange allele is recessive to the black fleshed type".