The Koi come in a wide array of colors. The black Koi are being distinguished due to their color, and nothing more. They can live up to 35 years, but the oldest of them have lived around 200 years! They are seen regularly in outdoor ponds throughout the globe.

The male Koi are recognized and distinguished by their concave anal section, as well as those breeding spots being displayed on their head. They can lay up to 1,000 eggs. The babies (called as the fry) will start to emerge within 4 to 7 days, depending on the water’s temperature. It’s amazing that their color emerge when they’re 3 to 12 weeks old. When they were first bred in Japan from carp mutations, they only had a color or two. More colors came in with more breeding through the years, resulting in a variety of beautiful colors and patterns.

They can grow up to about 36 inches long, which calls a need for them to be kept in ponds that are large in size. The Magoi Koi is considered as one of the first black mutations which can reach to great sizes in length. Their actual color is deep bronze, which can be seen as black when they are being viewed from above. Due to their unique possibilities in terms of size, the Magoi blood is re-introduced to other species to maximize their growth potential.

The Karasu (Japanese for "crow") is another one of those extremely old species. It is characterized by its black fins and body. It has a white or orange-colored belly.

They can also have the ability to change color due to environmental or dietary effects. The color changes range from duller shades to brighter ones. The Matsukawabake is known for this characteristic, which is typically black in color that has areas or white on its own body. Depending on the temperature of the water or seasons, its color can change completely. It can turn to a full white or full black, and will go back to its original color once the temperature conditions will change.

The Kumonryu (”kumonryu” which means “dragon fish”), which made its first appearance around the 80’s, is considered to be as the most popular of the species. It was designated with such a name as it is reminiscent of the bodies of dragons that are depicted by the paintings of the ancient times (some would say that these fish looked as if they were dragons that ascend through the white clouds). This can also change their colors.

Owners are attracted to the Koi's variety of colors and patterns, and surely there's nothing more exciting compared to owning such a magnificent and beautiful fish!

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