“…The brown smoothhound shark, Mustelus henlei (Gill, 1863) is a primarily demersal Carcharhiniform shark found along the Pacific coast of the Americas, from California to Peru (Compagno, 1984; Ebert et al, 2021). This species is heavily fished in Baja California, Mexico (Medina-Morales et al, 2020; Smith et al, 2009), which has facilitated several studies into its biology and ecology in the region (Pérez-Jiménez and Sosa-Nishizaki, 2008; Byrne and Avise, 2012; Pantoja-Echevarría et al, 2020; Gayford et al, 2023a). M. henlei has a relatively great distribution compared to other Mustelus species with which it exhibits some degree of range overlap (Chabot et al, 2015), however it appears that populations are differentiated both genetically (Chabot and Haggin, 2014; Chabot et al, 2015) and ecologically, with ontogenetic and sex-based trophic variation, and overall trophic position appearing to differ between study sites (Ruso, 1975; Espinoza et al, 2012; Rodríguez-Romero et al, 2013; Amariles et al, 2017).…”