The Silver Sphere

Aquaman must try and stop a war that begins after a silver sphere mysteriously appears from a crevasse in the ocean floor. Tortoids and The Lizard Men both want the sphere and Aquaman suggests that they compete in a series of athletic events to determine ownership rather than to fight over it. The winner to have possession of the sphere for an entire year. The Black Manta has been observing from his nearby ship and he also wants the mysterious silver sphere.