Ocean Master is a supervillain appearing in American comic books published by DC Comics. The character was created by Bob Haney and Nick Cardy, and debuted in Aquaman #29 (September 1966). Ocean Master is the alter ego of Orm Marius, the half-brother and one of the greatest enemies of the superhero Aquaman. The character has had numerous origin stories throughout his comic book history, having been depicted as a human seafaring pirate in his original appearances during the Silver Age; an Inuit of homo magi descent following Crisis on Infinite Earths; and a pure-blooded, xenophobic Atlantean of royalty who seeks to punish humanity for causing marine pollution since the New 52 continuity reboot. Despite these varying depictions, Orm is consistently portrayed as a jealous and vindictive man who plots to usurp the throne of Atlantis from his half-brother. Ocean Master has been adapted from the comics into various forms of media. Patrick Wilson portrayed the character in his live-action debut in the 2018 DC Extended Universe film Aquaman, and will reprise the role in the upcoming 2023 sequel Aquaman and the Lost Kingdom. Richard Green, Wallace Langham and Sam Witwer have provided the character's voice in animation. Publication history Ocean Master first appeared in Aquaman #29 (September 1966), created by Bob Haney and Nick Cardy. Fictional character biography Pre-Crisis Orm Curry was Aquaman's fully human half-brother, the son of Tom Curry (Aquaman's father) and a woman named Mary O'Sullivan. He grew up under the shadow of his heroic half-brother and resented the fact that he had none of Aquaman's powers, being fully human, and he was already a petty criminal when he was stricken with amnesia and forgot all about his former life, disappearing shortly afterwards. Several years later, the self-named Orm Marius reappeared as the Ocean Master, a high-tech pirate who initially attacked ships but quickly moved on to causing natural disasters to hold the world at ransom. Aquaman and Aqualad were captured by Ocean Master but managed to escape. Aquaman was then unable to fight Ocean Master after having seen behind the Ocean Master's mask and realizing that he was his half-brother Orm, although he did stop his plan. In his subsequent appearances Ocean Master, believing Aquaman was afraid of him, had decided to overthrow Aquaman and usurp his throne. Unable to survive underwater, he made a special costume and helmet to help him breathe while in the