"The main objective for this study was to provide information on the relationship between dolphinfish (Coryphaena spp.) catches and the environmental conditions, which could help to explain dolphinfish movements in the eastern tropical Pacific Ocean off the coast of Mexico—a topic that is still under debate. We analyzed a 10-year (2004–2013) database of estimated incidental catch from the InterAmerican Tropical Tuna Commission, reported by observers on board tuna purse-seine ships. Significant seasonal and interannual differences were found in the incidental catch. No segregation due to size was apparent. Two areas of high catch were present in the study zone: one near the Baja California Peninsula that is especially productive during summer, and a second in an oceanic area (~15°N, 120°W), which is present all year long but becomes more important during May–June..."