It is an ornamental fish originating from Japan, belonging to the Cyprinidae family, known for its bright golden color and elegant body shape. The body color ranges from dark orange yellow to bright gold, usually shining with a charming luster under sunlight. The body is short and wide, with large and neat scales. The head is usually rounded, and the mouth is slightly upward. It has a streamlined body and a wide tail fin. Relatively gentle in personality, usually coexisting peacefully with other fish. Strong adaptability, able to survive under various water quality conditions, but it is best to raise in clear and oxygen rich water. In Japanese culture, koi is regarded as a symbol of longevity and prosperity.