There are regular competitions to name the top koi. Judges and buyers pay attention to how healthy its skin looks, its size and body shape, and how gracefully the fish moves in the water.

“We let the water circulate for a week, then we slowly add in the koi,” he says. They typically come in transparent bags and ...

A stellar nursery 3,600 light-years away from Earth has taken the shape of a brilliant koi fish. Astronomers in Chile captured the celestial swimmer using the VLT Survey Telescope (VST), offering ...

Then the next layer of resin is poured, and the process is repeated multiple times. Koi fish are popular in Lillian's work because she took care of them for 12 years before painting them.