Captain Black Jack is a modern-day pirate, who took advantage of the nations were at war to plunder ships. In his first appearance Black Jack and his gang stole a yacht full of passengers and threw the ship's captain at sea, luckily he is saved by Aquaman, who quickly defeated the Black Jack 's gang and returns the command of the yacht and that was stolen the captain. But trying to catch the villain, Aquaman is surprised by a gas pump, knocking him unconscious.