14 Weirdest Comic Book Weaknesses
3. Aquaman - Dehydration
So long as Aquaman is exposed to water, he is one of the most powerful beings on Earth. Because of this, the marine monarch has to take a dip in the sea every once in a while to recharge himself. If he is away from the ocean for an extended period of time, he can pass out or die from dehydration. (This is a massive concern when Aquaman is on a mission in the desert.)
In his earlier stories, this vulnerability was more extreme. When he debuted, he was only able to venture outside the waters for an hour, making him pretty useless in long-term battles on the surface.
Even though the King of the Seven Seas isn't as weak out of the water as he once was, his enemies still find a way to use it against him. During the Tower of Babel storyline, Aquaman was exposed to Scarecrow's fear toxin, causing him to develop a deathly fear of water. This hydrophobia was so intense, he refused to touch or drink water, even though he knew avoiding it would kill him.