Action Comics # 244 (Source DC Wikia)

8. That time Superman went underwater and made himself a throne and a crown

Ok, fine, technically the throne and crown thing only happened on the cover, but I still love how completely and utterly bored he looks by having to save people. What, Superman, do you and your jaunty crown have better things to do underwater? Anyway, the actual content of the issue revolves around Superman finding two alien merpeople and leaving the surface to live with them at the bottom of the sea, completely and utterly ignoring/hiding from the surface dwellers panicking about his absence.

Superman then poisons the sea with oversalting to trick the aliens into leaving, because if there was one thing Silver Age Superman was just all about, it was tricking people all the gosh-darn time. Silver Age Superman only knew two ways to solve problems: either A: trust-shattering levels of lying and deceit, or B: Punching people and animals right in their stupid faces. It was a good time to be Superman.