On paper, the ocean is increasingly protected. Governments have designated large marine protected areas (MPAs) and committed to conserving 30% of the sea by 2030. Maps suggest progress. Offshore, little has changed. Industrial vessels continue to fish in restricted waters, and penalties remain inconsistent. The issue is not new rules, but whether existing ones are enforced.
Designating MPAs is politically straightforward, especially in remote areas. Enforcing them is harder. Patrols are costly, legal processes are slow, and fisheries agencies often lack resources. Governments often choose between announcing new protections and investing in enforcement that may provoke domestic opposition.
Evidence suggests results depend on credible oversight. Protected areas that are monitored tend to show ecological gains. Those that exist only in law often do not. Even limited monitoring can improve fish stocks within a few years.
Technology is beginning to change how enforcement works. AIS tracking, satellite imagery, and AI/machine learning now allow authorities to identify suspicious activity without constant patrols. Monitoring can now focus on specific vessels or locations, reducing costs and improving detection.
Indonesia’s mid-2010s crackdown illustrates this shift. Using vessel tracking and selective prosecutions, it signaled that violations would be punished. Illegal fishing declined in several areas, and stocks began to recover. What mattered was the perception that violations would be detected and punished.
Elsewhere, countries like Palau rely on remote monitoring and port-based inspections. The Port State Measures Agreement further shifts enforcement toward ports, where vessels depend on access to offload and refuel. This reduces the need for open-ocean policing.
Transparency is emerging as a practical tool. Public vessel-tracking platforms allow external scrutiny, increasing political pressure to act on violations.
Challenges remain. Evidence must meet legal standards, and technology has limits. Enforcement still depends on institutional capacity and political will.
If the past decade was defined by drawing boundaries on maps, the next may be judged by what happens within them. The sea’s recovery may hinge on whether designations are taken seriously once they appear on the map.
The full essay: The ocean’s enforcement gap
