The term references a specific color variation observed in Betta splendens, commonly known as Siamese fighting fish. This variant displays a combination of warm and cool hues, creating a visually striking aesthetic. The distribution of these colors can vary considerably, ranging from subtle accents to dominant patterns across the fish’s body and fins. For example, a specimen might exhibit a primarily blue body with orange fins, or vice versa, or possess a marbled pattern incorporating both colors.
This color combination is highly sought after by aquarists due to its rarity and visual appeal. The vibrant contrast is aesthetically pleasing and can enhance the overall look of an aquarium. The development of these colors is a result of selective breeding practices aimed at producing specific traits. Historically, Betta splendens were bred for aggression in fighting contests, but modern breeding focuses primarily on color and finnage.