Southern resident orcas have a favorite food, and eat almost nothing else: Chinook Salmon! As the largest, fattiest, and most nutrient-rich species of salmon it's easy to see why orcas prefer these fishy "energy bars." Chinook used to be plentiful and available throughout the orcas' range yeat-round. Now, many Chinook salmon populations are endangered or completely gone. the Southern Residents need abundant and reliable wild salmon from California all the way to Canada.