This study examines settlement chronology and subsistence patterns in Cabo Pulmo, Baja California Sur, Mexico, through the middle and late Holocene. The authors argue that coastal resources, notably shellfish and small fish, supported long-term human occupation in the Cabo Pulmo, influenced by shifts in water availability and access to diverse marine ecosystems. They present findings from radiocarbon dating and faunal analysis at sites within CPNP, showing that human occupation likely began around 7120-6755 cal BP, but intensified around 2000 years ago. The study identifies significant shell-midden sites with diverse faunal remains, including fish, marine mammals, and birds, alongside various mollusks, indicating a subsistence focus on both marine and limited terrestrial resources. The authors highlight further research in the area as necessary for understanding the broader context of human adaptations in the region over time. This research provides a framework for analyzing coastal resource use and settlement trends in Baja California in general while providing additional focus on subsistence trends as they continued into the middle and late Holocene periods in areas with cultural prominence to the Pericu culture