“…Several morphological abnormalities have been reported in sharks (Subclass: Selachii) in different marine ecoregions around the world. This reports include albinism (e.g., Clark, 2002;Saïdi et al, 2006;Bottaro et al, 2008;Escobar-Sánchez et al, 2014), bicephaly (e.g., Galván-Magaña et al, 2011;Wagner et al, 2013), diprosopia (e.g., Mancini et al, 2006;Hevia-Hormazábal et al, 2011;Driggers et al, 2012), deformities in axial skeleton (e.g., Pastore & Prato, 1989;Heupel et al, 1999;Mancini et al, 2006), mummification (e.g., Rosa-Molinar et al, 1983;Sandoval-Castillo & Villavicencio-Garay-Zar, 2008) and even cyclopia (Bejarano-Álvarez & Galván-Magaña, 2013). Blue shark (Prionace glauca) is the shark species with the highest number of anomalies reported, which have been described by different authors (e.g., Goto et al, 1981;Mancini et al, 2006;Galván-Magaña et al, 2011;Hevia-Hormazábal et al, 2011;Bejarano-Álvarez et al, 2013;Ehemann et al, 2016;Rodríguez-Romero et al, 2018;Ramírez-Amaro et al, 2019).…”