Pronunciation: [kˈɔ͡ɪ] (IPA) 
The word "Koi" is a Japanese term to describe ornamental varieties of carp. This word is typically pronounced as /koʊ/ in English, with the first syllable rhyming with "go" and the second syllable sounding like "ee." It must be noted that the vowel sound in the first syllable can also be pronounced as /kɔɪ/ in some dialects. In Japanese, the word "Koi" is spelled as 鯉, which is a combination of the characters for "carp" and "intensity."
Koi refers to a type of ornamental fish originating from Japan. It is a colorful subspecies of the common carp (Cyprinus carpio), with distinct patterns and vibrant hues. The word "koi" itself is derived from the Japanese name for the fish, which means "carp" in English. Koi fish are highly valued for their aesthetic beauty and are widely kept in artificial ponds or water gardens called koi ponds.
These fish are renowned for their striking colors, including red, orange, yellow, white, black, and various shades of blue. Furthermore, they exhibit captivating patterns, such as speckles, patches, and stripes, that can vary greatly between individuals. The desirable characteristics of koi fish include strong, well-proportioned bodies, glossy scales, and balanced patterns.
Koi are domesticated fish that have been selectively bred over centuries by Japanese fish pond enthusiasts. This process has produced numerous distinct varieties, or "breeds," each displaying unique coloration and patterning. Some popular types of koi include Kohaku (white body with red markings), Sanke (white body with red and black markings), and Showa (black body with red and white markings). Koi are known for their longevity, with some individuals living up to several decades.
Koi fish hold cultural significance in Japan, symbolizing good luck, perseverance, and fortune. In addition to their decorative appeal, these fish are admired for their tranquil swimming behavior, which can have a calming effect on viewers.
The word "koi" has its origins in Japanese. In Japan, "koi" (鯉) refers to a variety of ornamental domesticated carp which are known for their vibrant colors and patterns. The term "koi" itself derives from the Japanese word "nishikigoi" (錦鯉), where "nishi" means "brocade" and "koi" means "carp". The use of the word "koi" in English and other languages typically refers to the Japanese koi carp specifically, rather than just any type of carp.
