The coastal and marine ecosystems of Osa support extensive marine resources including sharks, coral reefs, and important fish stocks. The peninsula is separated from the mainland by one of only four tropical deep water fjords in the world, the Golfo Dulce. Rich in marine mammals and sea turtles, this gulf supports a vibrant artisanal fishing and ecotourism industry. Osa Conservation is building strategic partnerships for the stewardship and protection of these incredible marine and coastal zone habitats–which include the Golfo Dulce, Terraba-Sierpe mangroves, pristine beaches, and patch reef island ecosystems. Together with local residents, fishermen, government institutions, scientists, and other stakeholders, we are promoting management strategies that will guarantee the long-term viability of this important marine landscape.