Octopuses are among the most cognitively complex invertebrates, with sophisticated problem-solving, play behavior, and individual personalities. Their welfare in research and aquaculture contexts requires species-specific approaches.
Octopus welfare has rapidly moved from a niche concern to a mainstream research ethics question. Their cognitive complexity — demonstrated through tool use, play, individual recognition, and rapid learning — places them firmly in the category of animals with rich inner lives. Research facilities using octopuses are increasingly required to provide environmental enrichment and minimize painful procedures. As octopus aquaculture scales up to meet demand, the challenge of housing solitary, cannibalistic, intelligent animals humanely becomes a significant welfare engineering problem requiring creative, species-appropriate solutions.