Koi ponds have become a popular hobby in the world, and the reasons are clear as to why. Koi are beautiful, vibrant fish that can literally light your day. Koi come in many colors, varieties, and kinds, so it is likely that everyone in the world can find at least one type of Koi that would suit their likes. While Koi may be a welcomed beauty to your pond, they also have an interesting history attached to them.