Koi fish tattoos
In China, it is believed that if the koi succeeded in climbing to "Dragon Gate" on the Yellow River, the koi will be transformed into dragons. Because of the Chinese legend, koi are considered a symbol of advancement and aspiration.
When used in tattoos, especially with running water, the koi is meant to symbolize courage and the ability to attain goals and to overcome life's difficulties. When the koi in the tattoo is shown swimming upstream, it can be used to mean that the tattooee is still struggling with their problem, whereas a koi swimming downstream implies that the tattooee has already overcome their difficulty. In other cases, the koi swimming downstream can represent the season of fall, and the koi swimming upstream can represent the spring.