Dear MarMam community, I am pleased to share our latest article published in Latin American Journal of Aquatic Mammals (LAJAM): “First Acoustic Description of Risso’s Dolphin (Grampus griseus) Whistles in Mexican Waters (Rio & Rosales-Nanduca, 2025b)” The paper can be found here (Open Access): https://lajamjournal.org/index.php/lajam/article/view/1727/661If or access the follow link: https://www.researchgate.net/profile/Raul-Rio Our data represent the baseline acoustic recording and characterization of whistles emitted by the Risso’s dolphin (Grampus griseus) in Mexican waters, filling a gap in the tonal sound repertoire of this species in the North Pacific Ocean. The fundamental frequencies of some whistle contours were “cut off” by the upper-frequency limit of the recordings (sample rate 48 kHz), suggesting that Risso’s dolphins would emit frequency whistles higher than 24 kHz. In the future, our data can further contribute to developing acoustic identification software, the progress of passive acoustic monitoring methods, and the best understanding of potential factors involved in this delphinid’s micro and macro-geographic acoustic variations. Happy reading! Raul Rio Universidade Federal de Juiz de Fora - UFJF ONG Som de Oceano (Ocean Sound NGO) http://www.somdeoceano.com.br<http://www.somdeoceano.com.br/> http://www.oceansound.org<http://www.oceansound.org/> Linktree: https://linktr.ee/somdeoceano Instagram: https://www.instagram.com/somdeoceano/ YouTube: https://youtube.com/@somdeoceano