Aquaman #26

This April 1966 issue of Aquaman throws the King of the Seas and Mera — her vivid red hair swirling dramatically — into the clutches of a spiraling white energy coil, while a mysterious woman in a yellow costume called The Huntress looks on from below, weapon in hand. Nick Cardy's cover art sells the menace perfectly, with the bold warning that O.G.R.E. has you on its "Timetable of Terror!" promising a villain organization operating at full, sinister confidence. It's a wonderfully energetic Silver Age cover that captures both the peril of the underwater world and the excitement of a new adversary stepping into Aquaman's rogues' gallery.