"Here are the differences in male and female mature discus that can be used with some degree of success.
1)Male discus often have an elongated and pointed dorsal fin. If the discus has a elongated, pointed fin, it is almost always a male. Depending on the strain, many males do not have an elongated, pointed dorsal fin. The elongation usually does not show up until they are about six inches, well after they are sexually mature.
2)The breeding tube on the female is larger than the male and is farther forward from the caudal fin. This can be used reliably, if you have done it many times and you take the discus out of the water and examine it under a magnifying glass. It is best to sedate the discus before attempting this.
3)Males lips are slightly larger than the females. This is a very difficult means of sexing discus, but can be used with success on some strains. I have particular success using this technique with wild caught discus.
Myth.The dominate discus is the male. UNTRUE, the female is quite often dominate and I have had many males killed by an over aggressive female. The only time that the male is consistently more dominate is when they are spawning. By that time they have laid eggs and there is no question of the sexes.
Myth.The female is thicker as she is carrying eggs. While this may be true to a VERY small degree, it CANNOT be used reliably to sex discus. Some of my skinniest discus are my best producers. After a successful spawn, a female would naturally be skinnier, but she would be no less a female. So if you are looking at a discus and do not have the correct spawning history, using this method would be worthless."
Credit:http
/www.somethingsphishy.com
Hopefully this helps people who have discus and dont know how to sex them. These will sometimes be true, it may not work for all dicsus, but like it says the do work to some degree.
1)Male discus often have an elongated and pointed dorsal fin. If the discus has a elongated, pointed fin, it is almost always a male. Depending on the strain, many males do not have an elongated, pointed dorsal fin. The elongation usually does not show up until they are about six inches, well after they are sexually mature.
2)The breeding tube on the female is larger than the male and is farther forward from the caudal fin. This can be used reliably, if you have done it many times and you take the discus out of the water and examine it under a magnifying glass. It is best to sedate the discus before attempting this.
3)Males lips are slightly larger than the females. This is a very difficult means of sexing discus, but can be used with success on some strains. I have particular success using this technique with wild caught discus.
Myth.The dominate discus is the male. UNTRUE, the female is quite often dominate and I have had many males killed by an over aggressive female. The only time that the male is consistently more dominate is when they are spawning. By that time they have laid eggs and there is no question of the sexes.
Myth.The female is thicker as she is carrying eggs. While this may be true to a VERY small degree, it CANNOT be used reliably to sex discus. Some of my skinniest discus are my best producers. After a successful spawn, a female would naturally be skinnier, but she would be no less a female. So if you are looking at a discus and do not have the correct spawning history, using this method would be worthless."
Credit:http
/www.somethingsphishy.comHopefully this helps people who have discus and dont know how to sex them. These will sometimes be true, it may not work for all dicsus, but like it says the do work to some degree.
