The Brain, the Brave and the Bold Aquaman : Season 1 Episode 16

The domed city of Atlantis is attacked by The Brain, who uses sonic brain waves. Aquaman and Aqualad go to investigate and intercept a missile attack with the help of their fish friends. However, after the sonic brain waves are activated, Aquaman no longer has control over the fish, giving The Brain the perfect opportunity to attack Aquaman.