They can only be sexed by observation during breeding season. At that time the males develop whitish spots on their gill plates and pectoral fins.
sorry but there is really know possible way to know i am a professinal vet soo...... ya
If it is a fantail betta, the boy will have very large, flowing fins. If it is a girl, the fins will be short and not very fancy.
The difference between a male goldfish and a female is that the female is usually bigger and in spring and the male gains a white pimple type substance on it's gill flap also the female is more of a gold color and the the male is a silver color.
the girl is bigger
A goldfish.... the difference is hard to spot (especially with modern varieties) you can with a trained eye spot the differences the in ventral fins between male and female, even then it isn't really easy to do without watching the fish spawn (which one lays the eggs)
Could be a boy or a girl ....
There is no difference but I think the girl ants weigh a fraction less
The easiest way to tell the difference is that the males may get what are called breeding stars on their gill plates during breeding season. The breeding stars look like small white bumps.This is not always the case though, and sometimes the only way you know is by seeing the female drop eggs, or the male fertilizing the eggs.
A Girl and a Goldfish - 2005 was released on: USA: 2005 (Royal Flush Film Festival)
the difference is that a fable is a boy but folktale is a girl
girl means not married and women is married
In most fish if you look at them with their head straight forward so it looks like they are skinny in Females usually one side is a little fatter than the other. But i think that might just be in goldfish.....