Whale
The IWC has designated two whale sanctuaries: the Southern Ocean Whale Sanctuary, and the Indian Ocean Whale Sanctuary. The Southern Ocean whale sanctuary spans and envelopes Antarctica. The Indian Ocean whale sanctuary takes up all of the Indian Ocean south of 55°S. The IWC is a voluntary organization, with no treaty. Any nation may leave as they wish; the IWC cannot enforce any law it makes.
False killer whale
The false killer whale is known to be much more adaptable in captivity than other dolphin species, being easily trained and highly sociable with other species, and as such it is kept in several public aquariums around the world, such as in Japan, the United States, the Netherlands, Hong Kong, and Australia. Individuals were mainly captured off California and Hawaii, and then in Japan and Taiwan after 1980. It has also been successfully bred in captivity. However, Chester, an orphaned newborn who was stranded in Tofino on Vancouver Island in 2014 and rescued by Vancouver Aquarium, died from a bacterial erysipelas infection in 2017 at the age of three and a half. Being the fifth whale to die in the aquarium, Chester's death caused the Vancouver Park Board to ban the aquarium from acquiring more whales.