A Japanese koi fish tattoo has a significant meaning which is rooted in ancient Japanese culture and stories. Generally, koi fish symbolize courage, strength, and overcoming adversities. According to a popular Japanese legend, a koi fish swam upstream against the powerful current of a river and against all odds, succeeded in reaching the top of the waterfall. As a result, the koi fish was transformed into a dragon and was rewarded with great power. This legend symbolizes determination and strength to persevere in spite of great obstacles or challenges. As a result, a Japanese koi fish tattoo can represent resilience, perseverance, and ultimate success. Additionally, koi fish also signify good luck, prosperity, and patience throughout life.