A fishing village is taught a lesson about the coral reef when Hoggish Greedly shows up. He uses dynamite fishing as a cover to rip off the coral reef remains with his new Reef Ripper. The villagers don't see this, as they are now being well fed by a plentiful, but quickly disappearing fish supply. When shown the devastating effects of pounding waves against a neighboring island village, the villagers ask the Planeteers to help stop Greedly. Captain Planet finds a creative way to recycle, and help start a new reef....

The Planeteers are shocked to see a mother whale killed during a whaling expedition engineered by Blight and Plunder. They are even more shocked to learn that it's legal, thanks to a loophole in the international laws that allow whaling for "research." They set out to prove that Blight's research for a "whale repellent" is bogus and are helped by a young Japanese teenager who is trying to dissuade his whaler father from working for the villains.