Marine Protected Areas Fail Reefs: Fishing Still Allowed in 90% of Sanctuaries

Nearly ten percent of the world’s oceans are officially designated as protected areas. But a new analysis shows that these zones often fail to deliver the intended conservation benefits. The main reason: commercial fishing remains legal in most of them. According to the study, many marine sanctuaries exist only on paper. While they are labeled as protected, they do not restrict the activities that cause the most damage to coral reefs. In practice, trawlers and longline vessels continue to operate inside these boundaries, undermining the ecosystems they are meant to safeguard. The researchers found that only a small fraction of these protected zones enforce full bans on fishing. The rest allow at least some extractive activity, which directly harms reef health. Without strict no-take rules, the protective status has little measurable effect on fish populations or coral coverage. Experts argue that the current system gives a false sense of security. Tourists and policymakers may believe these areas are safe havens, but the data tells a different story. Effective protection, the authors conclude, requires more than a line on a map—it demands active management and enforceable restrictions. The findings highlight a gap between political commitments and real-world outcomes. As global negotiations on ocean conservation continue, this study serves as a reminder: a protected area is only as strong as its weakest regulation.