Frisch-Jordán, A., Enríquez-Paredes, L.M., Llamas-González, M., Victoria-Cota, N.L. , Flores-Márquez, F. , Morales-Vázquez, J.E., Torres Campos, E., Reyes-Núñez, C. , Ransome, N. and Ortega-Ortiz, C.D. 2026. First confirmed case of neonatal fraternal twin humpback whales in the Mexican Pacific Distinct Population Segment. Latin American Journal of Aquatic Mammals. 21, 1 (Apr. 2026), 27-35. DOI:https://doi.org/10.5597/lajam000364.