The Gold Marble Blushing Angelfish is probably best known as a “Koi.” Genetically it is a Gold Marble that has no stripes. We like to call them Koi Anglefish.
Sexing angelfish or "Pterophyllum scalare" can be very difficult. Many breeders just wait until two angelfish pair up and then move the pair to another tank. Then if they get viable spawn you know you have a male / female pair!