Interest in farming octopus and other cephalopods is growing commercially, but these highly intelligent animals present unique and serious welfare challenges.
Cephalopod farming raises welfare concerns of exceptional seriousness given the cognitive and behavioural complexity of these animals. Octopus are naturally solitary, exploratory, territorial animals. Confining them at density produces aggression, cannibalism and stereotypic behaviours indicating profound frustration. Unlike farmed fish, octopus show evidence of individual personality, complex learning and what may be play behaviour. The absence of validated humane slaughter methods compounds welfare concerns at end of life. Animal welfare scientists have been near-unanimous that commercial octopus farming as currently envisaged cannot meet acceptable welfare standards. This represents a case where precautionary prohibition is strongly warranted.