Overfishing Threatens Southeast Asia’s Fishery Supply Chain

Overfishing is depleting fish stocks that supply more than half of the world’s fish, sparking a crisis in Southeast Asia’s coastal waters.

The decline matters because the region’s catch underpins food security for billions and fuels economies that employ millions of small‑scale fishers. When stocks falter, both diets and livelihoods face uncertainty.

Southeast Asia accounts for over 50 percent of global fish production, according to an NPR photo series documenting the issue ^[1]. The same series notes that many of the waters are among the most depleted and contested in the world, warning of long‑term ecological damage.

A 2025 Mongabay study paints a more nuanced picture, finding that 43 percent of marine stocks in the region are classified as underfished, a sign that a substantial portion of fisheries remain healthy ^[2]. Those underfished stocks are 3.6 times higher than the global average, suggesting that not all fisheries are in crisis ^[2].

The contrasting assessments highlight a key tension: while overall catch volumes stay high, the pressure on heavily targeted species continues to erode biodiversity and resilience. Overfishing also drives illegal, unreported and unregulated (IUU) activity, which can further strain management efforts.

Local communities feel the impact daily. In coastal villages of Thailand and Indonesia, fishers report smaller hauls and longer trips, forcing some to abandon traditional practices for wage labor or migration. The shift threatens cultural heritage tied to centuries‑old fishing techniques.

Policy responses vary. Some governments have introduced seasonal closures and gear restrictions, yet enforcement remains uneven. International NGOs call for ecosystem‑based management that balances harvest with conservation, but funding gaps hinder large‑scale implementation.

The photo series that brought the crisis to public attention earned the 15th Carmignac Photojournalism Award, underscoring the power of visual storytelling to spur dialogue on environmental threats ^[3].

Experts agree that without coordinated action, the region could see a sharp drop in catch volumes, raising global fish prices and compromising nutrition for low‑income consumers worldwide.

**What this means** The mixed data reveal that Southeast Asia’s fisheries are at a crossroads: abundant catches mask underlying depletion of key species. Sustainable management, stronger enforcement, and investment in alternative livelihoods are essential to preserve the food supply that feeds half the planet.