A breeding discus pair refers to two discus fish that are a sexually mature male and female, and have been paired together in an effort to breed and produce offspring. Discus fish are a species of cichlid fish native to the Amazon River basin, and are known for their unique body shape and vibrant colors. They are considered to be relatively difficult to breed in captivity, but with proper care and conditions, a breeding pair can be successful in producing a viable spawning.