Mako is from the Sharkskin tribe. Many years ago the Atlanteans were exposed to radiation from a chasm that had opened up on the ocean floor. Some of them developed tough shark-like skin, long claws grew on their hands, and a fin sprouted on their heads. The Atlanteans refused to accept their people in this condition and exiled them far away to another part of the vast ocean, so as to never see them again. As the years passed and generations came and went a resentment began to take hold of them. They no longer wanted to be exiled from their kingdom and so they revolted. They have launched many attacks on Atlantis, but have yet to find any success. These losses only makes their anger and hatred grow, and soon they will attack again.