Ocean-Master

Ocean Master was a villain who once fought against Aquaman. He was on the verge of defeating Aquaman when two students from the Conservatory of Sorcery, Garth and Kaldur'ahm, intervened. This gave Aquaman the upper hand, allowing him to triumph.

Production background
In other continuities, Ocean Master is the villainous identity of Prince Orm. In this series, no connection has been made as yet between Orm and Ocean Master.