Yellow Dragon fruit have an oblong shape and are slightly smaller in size than the more common red varieties. The fruits measure approximately 10 centimeters long and 7 centimeters wide. Their size depends on climatic conditions and are often categorized into three different size groups. Their thick yellow skin is covered in small knobby protrusions, which when immature displays small spines that will naturally fall off as the fruit matures. Beneath the skin is a dense white flesh containing numerous petite, edible black seeds. Yellow Dragon fruit has a crisp, juicy texture and very sweet, tropical flavor with floral hints and no acidity.lso known as Pitayas, Thanh long