Sexing discus has always been problematic at best. However, I recently read an article in Diskus Brief which describe a method for sexing Discus that has been very reliable for me. The method described uses "geometry" to determine sex ... Picture a discus facing to your left ... you would be looking at it's side. Find the Dorsal (Top) and Anal (bottom) fins and look where the fins slope down toward the Caudal (tail) fin ... make sure you're looking at the fins after they have curved back toward the tail. The Dorsal and Anal Fins become (almost) straight after the fins curve down (or up) toward the Caudal Fin ... extend an imaginary line along this straight section of the 2 fins back toward the tail which just touches the Dorsal & Anal Fins past the Caudal Fin. These two imaginary lines should intersect behind the fish. The key to sexing the fish is where the lines cross the Caudal fin. If they pass through the Caudal Fin, the fish is most likely a FEMALE. If they miss or just touch the Caudal Fin, then most likely it is a MALE.
I have tried this on 12 pairs of Discus that I am breeding ... in ALL cases this proved to be true! I have since used this method to "create" 3 breeding pairs, plus provide a male for a female who lost her mate (the new couple are successfully breeding). Logically, this makes sense, since the Male fish tend to have higher bodies than the females (causing the lines to miss the tail).
I'd love to hear back from others who can test this out with their pairs
Autor:Jeff Richard
I have tried this on 12 pairs of Discus that I am breeding ... in ALL cases this proved to be true! I have since used this method to "create" 3 breeding pairs, plus provide a male for a female who lost her mate (the new couple are successfully breeding). Logically, this makes sense, since the Male fish tend to have higher bodies than the females (causing the lines to miss the tail).
I'd love to hear back from others who can test this out with their pairs
Autor:Jeff Richard
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