The vaquita (Phocoena sinus), an elusive porpoise found only in the shallow waters of Mexico's northern Gulf of California, is one of the rarest and most endangered marine mammals on Earth. Measuring about 5 feet (1.5 meters) in length, it is the world's smallest cetacean—a group that includes whales, dolphins and porpoises. Known for the distinctive dark rings around its eyes and mouth, the vaquita remained unknown to science until the latter half of the 20th century. Today, it has become a global symbol of the growing biodiversity crisis unfolding in the world's oceans.

The vaquita (Phocoena sinus), an elusive porpoise found only in the shallow waters of Mexico’s northern Gulf of California, is one of the rarest and most endangered marine mammals on Earth. Measuring about 5 feet (1.5 meters) in length, it is the world’s smallest cetacean—a group that includes whales, dolphins and porpoises. Known for the distinctive dark rings around its eyes and mouth, the vaquita remained unknown to science until the latter half of the 20th century. Today, it has become a global symbol of the growing biodiversity crisis unfolding in the world’s oceans.

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