Orcas in captivity suffer profound welfare harms from social disruption and space restriction, while wild populations face threats from prey depletion, noise pollution, and chemical contamination — making their welfare a conservation priority.
Orca welfare concerns operate on two distinct scales. Captive orca welfare has been extensively documented — collapsed dorsal fins (a result of swimming in circles in limited water), stereotypic behaviors, aggression toward trainers and conspecifics, and dramatically shortened lifespans all indicate profound welfare compromise. The 2013 documentary Blackfish brought these harms to global attention and triggered SeaWorld's phaseout of breeding and theatrical shows. For wild orcas, welfare is shaped by food availability, chemical burden, and acoustic environment. Southern Resident orcas face starvation stress when Chinook salmon runs fail — they are seen in poor body condition, carrying "peanut head" — a physical sign of severe malnutrition. PCBs accumulated in blubber impair immune function and reproductive success across generations.