Sub-Mariner #51

An undersea clash of royalty takes center stage in this 1972 Marvel issue, as Namor lunges forward against the armored Prince Byrrah — a battle the cover boldly promises is nothing short of "Armageddon at Fifty Fathoms Full!" Gil Kane's pencils and Frank Giacoia's inks bring the confrontation to vivid life, with a blonde woman caught in the struggle and a swarm of combatants filling the churning waters behind them. With Bill Everett both writing and drawing the interior, this is a strong chapter in one of Marvel's most distinctive underwater adventures of the early Bronze Age.