Cephalopods including octopuses are among the most cognitively complex invertebrates. Their recent inclusion in animal welfare legislation and growing use in research and aquaculture raises important welfare questions.
Octopus welfare represents a frontier area where the evidence of cognitive complexity is strong but welfare practice lags far behind. Octopuses and other cephalopods are highly intelligent animals whose cognitive sophistication demands welfare consideration proportional to their capacities. The EU's recognition of cephalopod sentience in research contexts is an important step, but aquaculture developments that aim to farm octopuses for food are proceeding with minimal welfare framework development. For animals of this cognitive complexity, welfare in captivity requires addressing isolation needs (they are typically solitary), environmental complexity needs, and stress from repeated handling - challenges that have barely been examined.