Do you know that the Koi is  is just a colored version of the Amur carp?
oh really? I think koi look very cool.
They are highly celebrated in Japan because there are lots of varieties there
yea they are big in japan but many americans even have koi ponds
They usually come in different colors which include white, black, red, yellow, blue, and cream.
i like the red and blue and black ones
group of fish originally found in Central Europe and Asia. Various carp species were originally domesticated in East Asia, where they were used as food fish. Carp are coldwater fish, and their ability to survive and adapt to many climates and water conditions allowed the domesticated species to be propagated to many new locations, including Japan. Natural color mutations of these carp would have occurred across all populations. Carp were first bred for color mutations in China more than a thousand years ago, where selective breeding of the Prussian carp ("
throughout Japan. From this original handful of koi, all other Nishikigoi varieties were bred, with the exception of the Ogon variety (single-colored, metallic koi), which was developed relatively recently. 
The hobby of keeping koi eventually spread worldwide. They are now sold in many pet aquarium shops, with higher-quality fish available from specialist dealers. The collection of koi throughout the years has become quite the social hobby for many who have ponds. It is also common for hobbyists who are passionate about their koi