He‘eia National Estuarine Research Reserve

He’eia National Estuarine Research Reserve protects 1,385 acres of ancient Hawaiian fishponds, wetlands, and coastal ecosystems on Oahu’s windward side. This isn’t just a preserve—it’s a living classroom where traditional Hawaiian aquaculture meets modern conservation science. Estuaries are where freshwater meets ocean, creating some of the planet’s most productive habitats. He’eia proves that protecting working landscapes and Indigenous knowledge systems goes hand in hand. Rep a reserve that honors the past while securing Hawaii’s ecological future.