Introduction to Butterfly Koi Definition and Characteristics Butterfly koi, also known as longfin koi or dragon carp, are a type of ornamental fish. They’re famous for their long, flowing fins and are a special breed of common carp. Butterfly koi, also known as longfin koi or dragon carp, are a type of ornamental fish recognized … Continue reading Butterfly koi Add Magic to Your Pond: Butterfly Koi Care Guide