Varied in color, ranging from greenish-brown to chocolate and gray. Individuals may be mottles with patches of grayish-white. Coloration is generally lighter on the flanks and underbelly, fading to a white or cream color.The beak is short and cylindrical, resembling a bottle in shape. Both sexes have large, protruding melons that are often vertical anteriorly in older animals and turn yellowish-white with age in males. The melon of the female is not as prominent as that of the male.The posteriorly-curved dorsal fin is 30-38cm in height and is located at a distance of 1/3 the total body length from the tail. The tail flukes lack a medial notch, and the flippers are small and pointed.