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.
Wildlife of Oman
Oman is also rich in marine diversity, especially cetaceans. There is a population of humpback whales that may be the most isolated, possibly the most endangered, and the only non-migratory population in the world. Off Muscat there are other humpback whales, pygmy blue whales, Bryde's whales, sperm whales, false killer whales, Risso's dolphins, spinner dolphins, bottlenose dolphins, Indo-Pacific humpbacked dolphins, and the occasional killer whale.