Bottlenose dolphins have widely spaced eyes, relatively long flippers, a rounded forehead (called a melon), a relatively short, broad snout, and a mouth that seems permanently twisted into a grin. Inside the mouth are as many as 100 teeth. Learn more about the Tursiops truncatus, more commonly known as a Bottlenose Dolphin, in this easy-to-read species overview by the Smithsonian's National Museum of Natural History.