Of the three species of babirusa, the Sulawesi babirusa is the largest. The male can be easily distinguished from the female by his large, curving tusks. These tusks are in fact upper canines, which protrude from the upper jaw and penetrate through the skin of the nose. The lower canines also protrude from the lower jaw; however they do not penetrate the skin. The function of the tusks is not yet clear. The Sulawesi babirusa is 34 to 42 inches long, with an 8-12 inch long tail. They can weigh between 95 and 220 pounds.