Jakarak was an anglerfish monster who was the former master of Seymour. Once he found Andros with Seymour, he believed he was trying to steal him. He requested to see Astronema and on the Dark Fortress, he told her his situation. He turned humans to stone on Earth. He turned Andros' feet into stone. Ashley detected that Jakarak's weak spot was between his eyes. He also turned the Astro Megazord partially to stone. The Delta Megazord shot the monster and the latter returned to normal and Jakarak was destroyed by the Astro Delta Megazord.