Flathead grey mullet (striped mullet; Mugil cephalus) is considered a single genetic stock in all US Atlantic Ocean and Gulf of Mexico waters (Rocha-Olivares et al. 2000). Such studies support the existence of a single population in the US Gulf of Mexico and along the NW Atlantic US coast. A regional fishery management plan within the US Gulf of Mexico recognizes this genetic homogeneity but advocates that, due to the generally non-migratory nature of the species, regional (sub-stock level) management of striped mullet is acceptable “as long as the overall stock can maintain itself” (Leard et al. 1995).