The Secret Mission Of King Neptune! * KING NEPTUNE Appearance A sea captain named Crane discovers a map which leads him the kingdom of an ancient sorcerer known as King Neptune. Crane transforms into the living embodiment of Neptune and begins wreaking havoc. Aquaman and Aqualad investigate and find that Neptune is attacking all of the main shipping lanes. Neptune transforms Aqualad into a hideous crab creature and forces him to fight with Aquaman. Neptune has actually taken control of Crane in order to prevent a volcanic ecological disaster. Once his mission is complete, he reverts back into the form of Captain Crane. Aqua-Crab transforms back into Aqualad.