Vaquita (Phocoena sinus) is a rare and critically endangered species of porpoise that is endemic to the northern part of the Gulf of California. Estimates of the number of individuals alive range from 100 to 300 and this beautiful creature has taken on the title of the most endangered cetacean in the world. The vaquita is stocky and has a classic porpoise shape but is distinguishable by the dark rings surrounding their eyes, patches on their lips, and a line that extends from their dorsal fins to their mouth. Vaquitas use high-pitched sounds to communicate with one another and for echolocation to navigate through their habitats. The vaquita is considered the most endangered of 129 extant marine mammal species and has been classified as one of the top 100 Evolutionary Distinct and Globally Endangered (EDGE) mammals in the world.