The miridon sea monster was a large, green reptilian beast native to the oceans of Tarnoonga. It would frequently nest and swim about the various undersea mountain tops that broke the ocean’s surface. In 15 BBY, the pirate known as, Captain Gir Kybo Ren-Cha, used one of the mountain peaks as a base of operations. One of his favorite hobbies included forcing prisoners to walk the planks of his Desert skiffs and watching them drop down into the sea–a snack for the miridon. Kybo believed that he had domesticated the creature and that it would actually respond to his commands, but this was merely a delusion of grandeur on Kybo's part.