When the koi fish tattoo design on the back body for men is shown swimming upstream, it can be used to mean that the koi fish tattoo design on the back body for men is still struggling with their problem, whereas a koi swimming downstream implies that the koi fish tattoo design on the back body for men 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.