Koi are a type of carp that have been bred to have distinct colors and patterns. Popularized in Japan, they symbolize luck, prosperity and good fortune. Koi are commonly kept in outdoor ponds and water gardens. My Koi Pond is a simulation of an outdoor koi pond, where you can interact with the koi or simply watch them swim about.
How to interact with the koi:
Click the surface of the water to create ripples
Click on a koi to pet them, they'll swim away quickly
Hold the "a" key and click, they will swim towards where you clicked
Hold the "s" key and click, they will swim away from where you clicked