Koi fish possessed the next sentence.

Good luck. Koi fish's possession, an online buzzword, koi fish is the representative of good luck, which means that wishes come true. So lucky people are always described as koi fish's possession.

Koi fish has a legend of "yue longmen carp" in China. It is said that carp that can jump over Longmen Waterfall of the Yellow River can become dragons. In Japan, carp represents perseverance and heroism. Their beards also represent wisdom and knowledge. Traditional carp tattoos are usually on forearms or legs.

Word source

Koi fish is an ornamental fish. It is strong, colorful and graceful. It is a kind of fish with high ornamental value. Koi fish is called good luck fish and wind and water fish. Because of its bright colors in the water, like peony in the water, it is also called a mermaid.

It is precisely because koi fish has beautiful connotations such as wealth and good luck that people always regard koi fish as a symbol of good luck. Because koi fish is a symbol of good luck, which means that wishes come true, very lucky people are always described as possessed by koi fish.