The IUCN Marine Mammal Protected Areas Task Force provides groundwork for conservation of whales, dolphins, sirenians, pinnipeds, and other marine mammals by identifying globally Important Marine Mammal Areas (IMMAs) through a robust, peer-reviewed process. IMMAs are discrete portions of habitat, important to marine mammal species, that have the potential to be delineated and managed for conservation. The task force has just identified 36 new Important Marine Mammal Areas (IMMAs) for the South East Tropical and Temperate Pacific Ocean from northern Mexico to the southern tip of Chile. The region’s notable cetaceans include Northern Hemisphere blue whales that range from the eastern Pacific coast south to the Costa Rica Thermal Dome. The Chilean fjords have endemic species of Chilean and Peale’s dolphins, marine otters, and a critically endangered southern right whale population that may range up to Peruvian waters. This region also features the legendary Galápagos Islands with sperm whales, various tropical dolphin species and an endangered endemic species of Galápagos sea lions. These additions mean that IMMA coverage is now 2/3 of the world ocean. View all 209 IMMAs globally, along with portfolios, maps, and other background information, on the IMMA e-Atlas.