Where their poop comes out. If it comes out horazontilly, it is a male. If it comes out straight, it is a female. Males are the most common.
The males usually have longer pectoral fins, with firmer stomachs, and the females have shorter pectoral fins with soft abdomens. Females also have a tendency to be larger than the males. Male goldfish also develop white spots on their gills. the males anal opening is also smaller and more round than the females.
It depends, if the goldfish are all males (or females) no, but if not of course they can mate.
The females lay eggs and the males fertilize them there is no sex involved.
In breeding season the males develop white spots on their gill plates. The females become plumper around the abdomen.
No. It is a territorial thing.
Males have testicles.
simple take the males and females apart or get a tank divider
Females have a protruding anus, while males don't.
A males anal is in and the females is out. anal-the but hole. found in between the back 2 fins. Hope I helped! Have a great day.
Goldfish can only be sexed when they are mature enough to breed and it is also breeding season. At this time the males have white spots on their gill plates and pectoral fins. The females just look a bit chubbier than the males.
Actually, goldfish don't have a specific gender. They are born as females, but as they grow, they turn into males.
The only way to sex a Goldfish is to see the fish in breeding condition. The males develop small white spots on their gill plates and Pectoral fins. The females get chubby around the abdomen as they fill with ova. If you are asking about Rosy Barbs the males are much more colourful than the females.