Koi Fish meaning in Japan is good fortune or luck they also are associated with perseverance in adversity and strength of purpose. According to Japanese legend, if a koi succeeded in climbing the falls at a point called Dragon Gate on the Yellow River, it would be transformed into a dragon. Based on that legend, it became a symbol of worldly aspiration and advancement.
Koi fish tattoo similar to what Eric and I have in mind for our couples tattoo. The fish I want are a bit more "abstract" rather than the realistic ones here and planning to have the fish wrap around each other creating a sort of yin and yang symbol.