Something FISHY with Batman?
"The MERMAN Batman!! BATMAN Vol.1, No.118, September 1958; Cover Art: Curt Swan, Stan Kaye, Ira Schnapp; Penciler: Sheldon Moldoff; Inker: Charles Paris “The Merman Batman!” in Batman #118 begins with Batman being struck by lightning as he falls into Gotham Harbor. Robin assumes the worst and cries out that the world has lost Batman forever. [...]