How early can you sex carpinitis?

[teqvet]

I understand the method of sexing a carpintis is by the black blotch about midline in the dorsal fin. My question is what size/age does this generally become possible? I have some very small juvies from Ken, and on the biggest one and the middle sized ones it looks as if there are black faded blotches but I haven't been able to get a good solid look yet - whether the lighting is bad for their angle, or they just refuse to put the fin up all the way to give a good view. The other 2 are just too small to attempt looking at it, and the bigger 2 may be as well. I was just trying to get an idea on things.

Thanks

 

[hailmike]

my two are about three inches and one has developed the blotch but it's not always there.

 

[Mike fail]

its hard if your not venting, overall shape and fins comes into play

 

[peathenster]

got the same question....mine are over 3" now and most of time it doesn't have the blotch...but sometimes it shows up...

 

[teqvet]

its hard if your not venting, overall shape and fins comes into play

Most folks have said that if it has a black blotch on the dorsal fin, then it is female and is just as guaranteed as venting. Is that not truly the case?

 

[bigriver]

About 3in you should be able to tell.As for experience with them if you see the black blotch once then you know.When i would just walk into a room it would stress them enough to fade away as they get older the shyness goes away.

 

[teqvet]

About 3in you should be able to tell.As for experience with them if you see the black blotch once then you know.When i would just walk into a room it would stress them enough to fade away as they get older the shyness goes away.

great to know, thanks for the clarification.