Fig. 1

Megachasma pelagios individuals from Mancora (MP-2) and Salaverry (MP-3) bycaught by small-scale net fisheries: a Lateral view of MP-2 showing the white ventral surface of a pectoral fin with the characteristic black margin, b anterior lateral view of the head of MP-2 with the visible white band on the upper jaw and between the nostrils. c Dorso lateral view of MP-3 showing its tadpole-like body, d view of the large mouth, white band on the upper jaw and white ventral hue