Despite their name, they are actually peaceful creatures, not killers, and they are actually not just whales, but they are part of the cetacean family known as dolphins. Doctor Pelagian used three killer whales to attack Superman and Aquaman, who were searching for him in the Atlantic. King Plasto made a robot killer whale out of FRERP, a type of plastic. Aquaman encountered it in the Pacific and referred to it as an "overgrown sea pachyderm."