egg laying fish sex?

Question

how can you tell the difference in males and females when they aren't live breeders? is there any way to visibly tell?

i want to know about my x-ray tetras!

Answer 1

Usually but not always the males are more colorful, and most colorful during spawning time. Other ways are fin shapes, like disc fish, where the male patella fins are pointed compared to the more rounded females. Tetras are some times hard to tell the sex type, but most female tetras are bigger and more plump looking then the male tetras.

Answer 2

When I breed tetras , I put 6 in the breeding tank leave them for 3 days and take them out . I usually have fry showing up the next day . I been breeding tetras for 40 years and there are some species that I can only guess which are males and which are female . The 6 fish in a tank gives pretty good odds that you have some of both sexes present .Sometimes I will have as few as 30 fry and there have been times I had hundreds . This has worked for me .

Answer 3

The females are larger than males of the same age and the females will tend to be "plumper" as they mature.

I've seen some literature that suggests there's a difference in the "shape of the swim bladder" with the male's being pointed and the females rounded, but I'm not sure of the reliability of this. It's probably not the actual swim bladder that's observed, but the peritoneum (sac that covers all the internal organs).

Answer 4

Ya theres a way but you kind of have to be an expert, but if you can get a good look at the anis area you should be able to tell the difference. I think with tetras the bigger anis is the male.

Answer 5

sometimes, for the xray tetras you look at their fins if the dorsal fin is big then that means it's a female