Editor's note: In Japan they symbolize just about everything that’s good: wealth, love, and career success. They often outlive their owners, having a lifespan of between 40 and 200 years, and can be passed down from generation to generation along with the silver and china! But the best thing about koi is their intelligence: they recognize their owners and will even eat from the hands of a trusted person. Celebrate these cool creatures with some colorful Koi wallpapers.