Ocean Master

Ruthless and bloodthirsty, Orm Marius will crush anyone who stands in the way of his ascent to the Atlantean throne, even his own half-brother, Aquaman.

Cain and Abel. Zeus and Poseidon. King Richard and Prince John. Ever since the beginning of time, there have been tales of brothers vs. brother. And the underwater kingdom of Atlantis is no different, having given rise to the legendary rivalry between Arthur, King of Atlantis, and his half-brother, Orm Marius, who is better known as the Ocean Master.

Orm is eternally jealous of his brother, known on the surface world as Aquaman, and has dedicated his life to not only taking his throne away from him—and thereby taking it for himself—but also destroying everything and everyone that he holds dear. Although they are related by blood, Orm has none of his brother’s nobility or charity, and only exhibits ruthlessness and sadism. 

Although the nature of their brotherhood has changed over the decades, it seems that the two half-brothers are always destined to be at odds no matter how the universe shakes out. Ocean Master will never rest until his older brother is destroyed and the throne of Atlantis belongs to him.

For more on Ocean Master's history, visit his page on DCUniverse.com.