What does the two koi fish circling each other mean?

In Chinese culture, koi fish are symbols of good luck, prosperity, and perseverance. Two koi fish circling each other, often depicted as a yin-yang symbol, represent the harmony and balance of yin and yang, the two opposing forces that are believed to make up the universe. This symbol represents the perfect balance between male and female, positive and negative, and all forces of nature. It is also a reminder that even in times of great difficulty, harmony can be achieved through balance and understanding.