Triton is member of the Inhumans' Royal Family, son of Mander and Azur, brother to Karnak, and cousin to Gorgon, Black Bolt, Maximus, Medusa, and Crystal. Triton was born on the island of Attilan and was exposed to the Terrigen Mist as an infant. The mists altered his body, turning his skin green and giving him the ability to breathe underwater, as well as surviving the cold temperatures and incredible pressures of the deep. An unfortunate side effect was the loss of the ability to survive in a non-aquatic environment. As a result, he lived in a specifically designed area of the Inhumans' city-state of Attilan, requiring a special breathing apparatus to leave the water. The apparatus, cumbersome at first, was eventually reduced in size by fellow Inhuman, Maximus the Mad. Triton's mutation after Terrigenesis was so severe that his parents disallowed his brother Karnak from going through it.