The ocean covers 71% of the planet's surface and hosts more biodiversity than all terrestrial ecosystems combined. It's also declining faster. Marine species populations have dropped by an average of 49% since 1970. Coral reef coverage has halved in the last 50 years. Over one-third of shark and ray species face extinction. The monitoring data to track these declines exists, scattered across thousands of research institutions, conservation organizations, and government agencies that were never designed to share it.

Marine protected areas now cover roughly 8% of the ocean, but enforcement and monitoring are inconsistent. Illegal fishing, unauthorized vessel traffic, and pollution violations in protected waters often go undetected because compliance monitoring requires correlating satellite imagery, vessel tracking data, and on-the-ground observation that live in separate systems. Research institutions conducting biodiversity surveys publish findings in journals that other organizations doing similar work in adjacent waters may never see.

NEREUS unifies marine biodiversity data, monitors protected area compliance, and tracks ecosystem health indicators across the world's oceans. It connects research institutions with conservation organizations and policy bodies, giving everyone working to protect marine life access to the same comprehensive picture. The marine science stays with the marine scientists. NEREUS provides the coordination infrastructure they've needed for decades.