Aquaculture

Giant River Prawn Welfare in Asian Aquaculture

Welfare overview for Macrobrachium rosenbergii -- the giant freshwater prawn farmed across tropical Asia.

Key Facts

Giant river prawns (Macrobrachium rosenbergii) are one of the most important freshwater aquaculture species in Asia
They are farmed in ponds across Bangladesh, Thailand, India, and China
Giant river prawns are decapod crustaceans -- welfare protections now extend to this group in some jurisdictions
They show complex social behaviour including male dominance hierarchies and territorial aggression
Large-claw males dominate feeding access -- welfare of subordinate animals in high-density systems is a concern
They are typically harvested by draining ponds and sorting live -- a high-stress welfare event
Boiling alive is a common slaughter method -- welfare implications are significant given decapod sentience evidence
2025 welfare science is increasingly examining decapod species beyond shrimp and lobster

Welfare Significance

Giant river prawn welfare occupies the same emerging welfare space as other decapod crustaceans. Their complex social behaviour and documented nociceptive responses make the precautionary welfare case compelling. Harvest and slaughter welfare improvements -- including pre-slaughter cold stunning -- are practically achievable and would benefit welfare of billions of animals annually.

What You Can Do

Advocate for cold stunning before slaughter as a welfare standard for all farmed decapods including giant river prawns
Support decapod welfare research that extends beyond shrimp and lobster to other cultured species
Choose certified products from operations that demonstrate welfare provisions for decapod species
Engage with aquaculture certification bodies about extending welfare standards to freshwater prawn production