Commercial octopus farming is rapidly developing; given strong scientific evidence of octopus sentience and complex cognition, this expansion poses unprecedented welfare risks for a highly intelligent marine species.
Octopuses present unique welfare challenges: as solitary ambush predators they cannot be housed communally without severe stress and injury; their cognitive complexity means environmental deprivation causes suffering; and killing methods validated for fish are unlikely to be humane for cephalopods. Several welfare scientists and ethicists have called for a moratorium on octopus farming pending species-appropriate welfare standards.