As far as overall look and behaviour outside of breeding season, no. During breeding season, your female may become a bit fatter with eggs, and your male will get breeding stars on his gill plates and along the pectoral fins; these look like tiny white bumps.
In some cases yes. It depends on the size of the aquarium that you place the fish in. Fish grow according to the size of the environment.
No not at all. They both eat the same amount of found...They are both pigs! :)
yes
Could be a boy or a girl ....
the girl is bigger
There is no way to tell.
a boy has a thinner body a girl has a fatter bodya boy has little white spots on it's fin and a girl dosn't
right after he meets a hot girl/boy stupid.
the gold fish is a boy if both its sides are the same size, but if the fish is a girl one side will be bigger than the other (it looks pregnant on one side of its body) And also sometimes girls are pregnant.
Usually if your goldfish is a boy it will chase the girl around..also it will be more narrow if you look at it from the top and the girl will be fatter (due to pregnancy). Another way to tell is the fin. If the fin is more of a wave it is a girl; if the fin is more of a spike then your fish is a boy. Hope this helps!
I asked in a pet shop and they said there is no possible way to find out sorry.
About at 7 to 8 weeks-DANIELLE LANDRY
sorry but there is really know possible way to know i am a professinal vet soo...... ya
nothing
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.