[GOLDBERG]

HOW DO I TELL THE SEX OF MY SINGLE SPILO?

 

[Clay]

There is no accurate way to sex piranha. The best way to get a pair is buy a known breeding pair or a group to improve the chances of getting several members of each sex.

 

[RhomZilla]

There is no accurate way to sex piranha. The best way to get a pair is buy a known breeding pair or a group to improve the chances of getting several members of each sex.

 

[piranha 13]

Try here Supernates Sexing page

You have to scroll down a little to find the sexing section.

 

[hastatus]

Even better follow this thread:

Piranha Science