Gold KoisLong ago, a large school of golden koi glimmered as they swam upstream along the Yellow River in China. Koi are known for being determined fighters that swim against the current. It gives them strength. When they reached a waterfall at the end of the river, it looked like a dead end. Some koi turned back, letting the flow of the river carry them away. But a few remaining koi were determined to keep going: Leaping from the depths of the river, they