Ah, but they are. However Pigeon Blood is the main strain, what this strain descended from and a general description/classification. White Butterfly is the actual strain name...just Pigeon Blood based. If that makes sense. They've been bred over the many years to bring out a very clean white fish out of the original orange/white PB strain and this is what the result is. Check out the link in my signature, Common Discus Strains & Abbreviations. Shows you the wide variety of colors, patterns, and strains. Many of those are Pigeon Blood based.GBR.Moorrreeee said:Nice looking fish, but are u sure those aren't Pigeon Blood Discus?