Surf Monkeys Must Dive!.When the Primate Avenger's scanners register that an occupied ocean planet is undergoing critical core destabilization, the Space Monkeys attempt to land to warn the inhabitants, only to be attacked by the militaristic society and shot down. The planet's pink ocean is, fortunately, made of hyper-liquidized oxygen, and thus breathable. Determined to continue their mission, the Space Monkeys discover the planet's inhabitants are divided into two subspecies; the surface-dwellers who attacked them, and another culture that lives entirely under the ocean and has been enslaved by the surface dwellers, endlessly mining the metallic core of the planet to provide the raw material that the surface-dwellers, whom the sea-dwellers believe are gods, use to construct floating cities...