Abalone are large marine snails prized for their meat and shells, with wild populations severely depleted by overfishing. Aquaculture production raises welfare questions about sentience, crowding, and a devastating herpes-like disease.
Abalone welfare sits in the zone of significant scientific uncertainty about mollusc sentience. Like oysters and mussels, abalone lack the neural architecture most strongly associated with subjective experience, but they possess more complex nervous systems than bivalves and show tissue-damage responses. The precautionary principle suggests treating abalone with some moral consideration while acknowledging that suffering risk is likely lower than for vertebrates or decapods. The most concrete welfare concern in abalone aquaculture is the devastating mortality caused by AVG — animals infected with this herpesvirus develop progressive tissue necrosis and die in large numbers. The quality of dying in disease outbreaks — with tissue destruction occurring over days — represents a welfare concern even under uncertainty about consciousness. Crowding that limits feeding access is a subtler concern. The long production timeline means that any ongoing welfare deficit compounds over years per individual fish.