Beneath the Shimmering Sea: A Dolphin's Tale

Previously

…Finally, with one last heave, they managed to wedge a large stone into the last open pipe. There was a deafening clang, followed by a violent shudder that shook the seabed. Then, with a final, dying groan, the machine fell silent. The churning current ceased, and the water began to settle, the darkness slowly receding. Nalu looked at the silent machine, then at the Crystal Pearl, its blue light now a steady, reassuring glow. They had done it. They had stopped the source of the pollution. And they had saved the pearl. A wave of relief, exhaustion, and triumph washed over Nalu. He had made a choice, and it had been the right one. The ocean was beginning to heal.