In 2012, scientists at UC Santa Barbara’s National Center for Ecological Analysis and Synthesis (NCEAS) launched the Ocean Health Index (OHI), a scientific framework to measure and track the health of the world’s oceans. Working in partnership with the nonprofit Conservation International, the OHI team measured the combined benefits that oceans sustainably provide for people—from wild-caught and farmed seafood to habitats that protect coastlines. Annual status reports show how and where to improve ocean management.