Milkfish Welfare in Southeast Asian Aquaculture

Key Facts

• Milkfish are euryhaline and can be farmed in freshwater, brackish, or marine environments
• Traditional milkfish culture in extensive fishponds has lower welfare costs but limited monitoring and management
• Semi-intensive culture in floating cages uses high stocking densities that create crowding stress
• Traditional slaughter by asphyxiation without prior stunning is widespread in Southeast Asian markets
• Milkfish are an important food security species for low-income populations in the Philippines and Indonesia

Welfare Considerations

Milkfish welfare receives little formal attention despite the enormous scale of production and cultural importance of the species. Traditional extensive fishpond culture is relatively low-stress for individual fish but lacks welfare monitoring. Intensive cage culture at high densities causes chronic crowding stress manifesting as increased cortisol, reduced feeding efficiency, and increased disease susceptibility. The traditional market preference for live fish results in prolonged live transport and asphyxiation killing — both welfare concerns as evidence for fish sentience strengthens. Consumer and regulatory pressure for welfare improvements is beginning to reach the milkfish sector through export market requirements.

What You Can Do

• Support aquaculture welfare research programs including milkfish and other important Southeast Asian species
• Advocate for welfare standards in Philippine and Indonesian aquaculture export regulations
• Choose certified milkfish products from operations with transparent welfare monitoring where available
• Support international development programs that improve smallholder aquaculture welfare in Southeast Asia
• Engage with fish welfare advocacy organizations working in Southeast Asian aquaculture contexts