Koi fish, especially the Kohaku variety, are prized for their beauty, longevity, and breeding potential. Factors like ...

Nishikigoi, better known as koi fish, are a well-known variety of the common carp. They are bright red and white and revered for their vibrance and grace. Even other animals, including their predators ...

A bright pink koi fish has been spotted swimming across the southern sky. The European Southern Observatory's (ESO) VLT Survey Telescope (VST) snapped a beautiful new view of the Gum 3 nebula ...

Or is a small koi on the loose? The identity of this fish remains a mystery ... a bigger aquarium and we both were surprised (at) how big it grew," Ty Houck, director of greenways, natural ...