Red Dragon fruits grow on long, thin, vining cactuses. On the outside, Red Dragon fruits look almost identical to the white-fleshed variety. The brightly colored oblong fruits are about 10 centimeters in length and can weigh up to a pound. They have pink to magenta-colored skin that has the appearance of succulent, fleshy scales overlapping, leaving small, green-tipped protrusions along its length. The skin is thin, with an average thickness of only 3 millimeters, so the flesh to rind ratio is high. The bright magenta flesh of the Red Dragon fruit is the result of a compound called betacyanin, which is the same pigment present in beets and prickly pear fruit. The pulp has the texture of kiwi fruit, with small, black edible seeds throughout. Red Dragon fruit is sweet, though not as sweet as the white-fleshed variety, and has mild acidity.