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.
Fin whale
Very little information has been revealed about the ecology of current migration from Antarctic waters are unknown, but small increases in sighting rates are confirmed off New Zealand, such as off Kaikoura, and wintering grounds may exist in further north such as in Papua New Guinea, Fiji, and off East Timor. Confirmations in Rarotonga have been increased recently where interactions with humpback whales occur on occasions. Finbacks are also relatively abundant along the coast of Peru and Chile (in Chile, most notably off Los Lagos region such as Gulf of Corcovado in Chiloé National Park, , port of Mejillones, and Caleta Zorra. Year-round confirmations indicate possible residents off pelagic north eastern to central Chile such as around coastal and Pingüino de Humboldt National Reserve, east of Juan Fernández Islands, and northeast of Easter Island and possible wintering ground exist for eastern south Pacific population. They are known to make mixed groups with other rorquals such as blue whales and sei whales. Their recovery is confirmed vicinity to various subantarctic islands such as South Georgia and Falkland, but unknown in other historical habitats including Campbell Island, Kermadec to Chatham Islands, Tristan da Cunha, and Gough Island.