Determining sex of Harlequin Rasboras

[yhbae]

According to the info on the net, one of the obvious gauge to determine the sex is to look at the dark triangle - if the vertical section of the triangle is perfectly straight, it is a female, if it curves, then it is a male.

The following is definitely a male:

I'm still struggling with this one:

What do you think? (Sorry about the fuzziness...)

The two females I have are very clear, the lines are perfectly straight and goes vertically down. Other two males have the line that curls so much that you can't really miss it. This one seems somewhere in between - perhaps little closer to female's triangle than male's... Hmm...

 

[yhbae]

I have another image that is much clearer after 1000 tries...

Male or female?

 

[mickey]

The bottom fish is a female, because the black wedge has straight lines , if it were a male they would be rounded.
Cheers.

 

[yhbae]

Originally posted by mickey
The bottom fish is a female, because the black wedge has straight lines , if it were a male they would be rounded.
Cheers.

Thanks for the confirmation - the other females I have features PERFECTLY straight lines, while this one curls a little at a bottom so I wasn't sure...

If this one doesn't spawn with the largest male, it probably isn't a female...