“Koi” means Japanese carp. Koi is popular not only in Japan, but also among the world. As far back as, 2500 years, Koi was found in China and Eastern Asia. Japanese Koi fish, which is known as Nishikigoi in Japan is the National Fish of Japan. Not only that, but there is also a belief that these fishes can also bring you luck, if you raise them. So, let’s know more about these Japanese Koi Fish!