Abalone are slow-growing marine molluscs farmed in land-based tank systems. Their welfare status is uncertain, but farming conditions including density, water quality, and handling deserve consideration under precautionary welfare principles.
Abalone welfare sits in genuinely uncertain territory — they are more neurologically complex than bivalves but simpler than fish. The precautionary principle suggests giving some consideration to their potential welfare interests while acknowledging that the probability of rich subjective experience is low. In practice, farming conditions that cause measurable physiological stress — poor water quality, overcrowding, disease outbreaks — are welfare-relevant regardless of the certainty of subjective experience, and also compromise production quality. Abalone withheld from adequate food compete aggressively and show growth rate suppression. The luxury price of abalone means the economic case for adequate stocking density and water quality is strong even setting aside welfare considerations. High-end abalone farming operations tend to have better welfare conditions than mass-volume producers.