Giant river prawns are among the largest freshwater invertebrates farmed globally, with welfare considerations similar to marine shrimp but on a larger scale.
Giant river prawn welfare involves unique considerations from their aggressive social structure. Unlike marine shrimp that tolerate crowding with primarily resource competition, male giant river prawns engage in direct, damaging aggression — dominant blue claw males attack and injure subordinate males throughout the grow-out period. This intra-specific violence causes chronic injury and death that represents significant welfare harm beyond standard aquaculture stressors. Single-sex female culture reduces aggression but has other welfare and production implications. As large decapods now recognized as likely sentient by scientific consensus, harvest methods warrant scrutiny — live boiling of large prawns lasting several minutes before death is standard practice. The UK's extension of welfare protections to decapods legally requires their welfare consideration in research; commercial aquaculture protections lag behind this recognition.