The documented intelligence, social complexity and emotional capacity of cetaceans raises fundamental ethical questions about their treatment in captivity and commercial exploitation.
The cognitive and emotional complexity of cetaceans places them in a category of moral consideration comparable to great apes. Animals with self-awareness, cultural transmission, complex social bonds and evidence of emotional depth can clearly suffer in ways that matter morally. This has profound implications for marine parks, where dolphins and orcas are maintained in conditions that deny them the social complexity, spatial freedom and environmental richness they need. The welfare case against cetacean captivity for entertainment is based on this evidence of their capacity for suffering, not merely on conservation concerns.