Ear morphs for sure. What's a Elli without a Dumbo! Tusk and teeth morphs. Smithsonian's National Zoo & Conservation Biology Institute Asian elephants have six sets of teeth, all six of which are present in the skull at birth. They are, however, very small. Each successive set of teeth is larger, more complex and lasts longer than the previous set. As a result, an elephant's skull grows throughout its lifetime to accommodate the new and ever-larger teeth. An elephant's age can be estimated by examining molar sequence and wear. Tusks are modified upper incisors that grow throughout an individual's life at the rate of 2 to 3 inches (5.1 to 7.6 centimeters) per year. They are composed of ivory, a material similar to bone that is made primarily of calcium and phosphate. The tusk has a pulp cavity containing nerve tissues. In an adult animal, about two-thirds of the tusk is visible while the remaining one-third is embedded in the socket, or sulcus, in the cranium. Newly developing tusks have a conical cap of smooth enamel that eventually wears off. Not all elephants develop visible tusks; in the Asian species, only some males have large, prominent tusks. Most female and some male Asian elephants have small tusks, called tushes, which seldom protrude more than an inch or two from the lip line. Tushes have a slightly different composition than tusks. They are small and brittle, causing them to easily break. A significant number of adult male Asian elephants are tuskless. The percentage of males with tusks varies by region, less than 10 percent in Sri Lanka to approximately 90 percent in India. This disparity may be a reflection of the intensity of past ivory hunting. In the African elephant species, generally, but not always, both the males and females have tusks. Tusks are extremely useful, multipurpose instruments. Elephants use them to dig for water, salt, minerals and roots; to debark trees; as levers to manipulate objects in their environment; for rescuing calves; for threat displays; as weapons for defense and offense; as trunk rests; and as protection for the trunk.