Aquaman #16

This 1964 DC gem presents a wonderfully strange aquatic dilemma right on Nick Cardy's cover: a green-skinned Aquaman — apparently transformed — stands alongside an equally green, dark-haired "Space Siren" in a sleek blue suit, while a worried Aqualad and a red-haired sea queen look on from the crashing surf below. The cover's speech bubble spells out the stakes with Silver Age charm — "We're doomed! Aquaman is not only in love with that Space Siren… he's let her change him into an alien — like herself!" — setting up the book-length thriller "The Duel of the Sea Queens!" with real flair. Cardy's fluid linework captures both the energy of the waves and the emotional tension of the scene, making this a genuinely fun snapshot of Aquaman at his most imaginatively offbeat.