The goal of this project is to study local cetacean populations and generate essential scientific information on their abundance, diversity, spatial and seasonal distribution. This knowledge helps improve management and conservation efforts while building a stronger scientific foundation for understanding these species in the region. At PROCETUS, we conducted seven consecutive years of research in Bahía de los Ángeles, creating one of the first long-term cetacean databases for the area. Throughout this work, we recorded 310 sightings of nine different cetacean species, including: common dolphins, bottlenose dolphins, pilot whales, sperm whales, killer whales, humpback whales, blue whales, Bryde’s whales, and—most notably—fin whales.