There are four main strains of discus fish are:
Blue Discus
Blue discus the body is yellowish-brown to light turquoise and its has variation of colour.
Brown Discus
The brown discus the body is usually yellow-brown and subspecies of the green discus.
Green Discus
The green discus the body color is yellowish-brown with the lower parts spotted red.
Heckel Discus
The shape of heckel discus is huge and rounder than other discus. Its body colour is red with turquoise veins running throughout. There are two ordinary strains in heckle which are red discus and pineapple.