Octopuses display remarkable intelligence, problem-solving ability, and behavioural complexity. Emerging proposals for octopus farming raise serious welfare concerns given their apparent sentience and unique biology.
Octopus sentience presents a compelling case for their welfare to be taken seriously. Their demonstrated capacity for problem-solving, individual recognition, play, and learning indicates a rich inner life that warrants protection from suffering. Aquaculture environments would confine highly active, wide-ranging, solitary predators into dense, artificial settings incompatible with their behavioural needs. The complexity of octopus neurology means standard welfare metrics developed for fish or mammals may be inadequate. Pain pathways in octopuses are well-established despite their different anatomy. The precautionary principle suggests that in the absence of certainty about their subjective experience, we should avoid creating conditions likely to cause suffering.