Harp Seals - or Saddleback Seals as they are sometimes known - have a black face, no noticable ears, and a silvery-gray body. They can reach lengths of 6 ft and weights of 400 lbs. Its flippers act as heat conductors either cooling or warming the animal and large reserves of body fat allow it to survive without food for extended periods of time. This species has exceptional eye-sight that is optimized for both low-light and polar conditions. The eyes are covered with a special liquid that helps protect the membrane from salt. When on land the Harp Seal can be seen 'crying' as it flushes salt from its eyes.