The Damas Island Estuary shelters eighteen square kilometres of red, white, and black mangrove forest—one of Central America's densest concentrations of littoral wetland. Here the Paquita and Damas rivers merge into tidal channels that flood twice daily, drawing nutrients from the Pacific and converting them into a nursery for snappers, grunts, and juvenile tarpon. By nightfall the forest transforms: four-eyed fish (Anableps dowi) rise to the surface, their bifurcated pupils scanning simultaneously above and below the waterline for predators and prey. Spectacled caimans patrol the shallows. Silky anteaters curl into fist-sized spirals on cecropia branches. Brown-throated three-toed sloths, invisible at noon, become visible by headlamp as they shift between canopy corridors. The estuary's biological productivity exceeds that of most terrestrial rainforests; one hectare of mangrove root mat supports more than two hundred fish species and serves as a roosting site for boat-billed herons, yellow-crowned night herons, and the occasional mangrove black hawk. Boat-based nocturnal excursions depart from the village of Damas around sunset, when the tide is high enough to navigate the narrower tributaries. Operators launch from wooden docks along the river mouth, where artisanal fishermen mend nets and egrets stalk the mudflats. The journey inward traces channels barely wider than the boat, overhung by tangled prop roots that shelter crabs, gastropods, and mudskippers. Guides use handheld spotlights to track eyeshine—the tapetum lucidum reflection that betrays a caiman's position in total darkness. Silence is protocol; the slightest scrape of paddle or hull sends ripples through water so still it mirrors the forest canopy above. The mangrove's ecological role extends beyond wildlife habitat. Its root systems trap sediment, stabilize coastlines, and buffer inland areas from storm surge. Carbon sequestration rates in mangrove soil exceed those of terrestrial forests by a factor of five, making these wetlands critical in climate mitigation strategies. Costa Rica's commitment to reforestation has restored degraded mangrove zones along the Central Pacific coast since the early 2000s, and the Damas estuary now functions as a living laboratory for restoration ecology. Night tours offer direct observation of this recovery: juvenile sharks and rays that vanished from overfished waters in the 1990s have returned, their populations rebounding as trawling bans take effect offshore.