Sub-Mariner #71

Namor faces one of his most relentless underwater threats in this 1974 Marvel gem — the cover by Gil Kane and Mike Esposito plunges the Sub-Mariner into a churning swarm of razor-toothed piranha, while a green-skinned villain commands the attack from above with a menacing cry: "Attack, my beauties! Let Namor feel the full, deadly power of the Piranha!" The tagline asks whether even the Prince of Atlantis can survive the onslaught of a million razor-sharp fangs, and Kane's dynamic composition makes the threat feel genuinely overwhelming, with the snarling fish filling every corner of the frame.