- BortLv 61 month ago
Goldfish are hard to sex when they're under 4" long but it's not impossible to do if you know what you're looking for. You have to look at their belly under their tail fin. Males will have a line (their "tool") on the underside of their belly near their tail fin and females will have a larger slit.
With that small of a fish it may be pretty difficult to tell what sex it is.
- pit bulls biteLv 71 month ago
they know, no problem