how do you know if a goldfish is a girl or a boy?

Answer 1

Here are someways to tell if your goldfish is male or female..
* The female Goldfish are slightly bigger than the males and look
even heavier in the abdomen when they are full of eggs.

* Male Goldfish develop white spots on their gills and pectoral
called "breeding tubercles" during spawning time.

* Males have midline ridges on their undersides beginning from
the back of their pelvic fins and ending at their vent opening.
This feature can be absent or smaller in females.

* Males have firm abdomen while in females; the area between the
pelvic fins and the anal fins is more pliable.

* Male Goldfish have longer and pointed pectorals as well as
stiff fin ray, while females have more rounded pectorals and
shorter, finer front fin rays.

* Male goldfish have smaller and more oval anal openings and the
anal fins are not as thick as that of the female goldfish who has
a larger and rounder anal opening with a slight protrude. The
anal fin is also thicker.

* The spawning time is the easiest time to distinguish the boys
from the girls. The female opening will look larger and more
swollen as the eggs begin to ripen. She would look big and
heavier. Since fish reproduce through external fertilization, you
can make out when a male is ready by the white breeding tubercles
and you can actually push out the milt through his ventral
opening by running a gentle finger along his sides.

* There is one more obvious, but kind of time taking way to make
out which one of your fish is male and female. Find out who is
chasing who - the chaser will be the male and the chased and
tired out one will be the female! It's the natural tendency on
part of the male goldfish to chase and nudge at a female's rear part.

Answer 2

Boys get breeding tubricles in the spring. They look like tiny pimples on the gill covers and leading edge of the pectoral fin. Look very closely, this is the time to tell. No tubricles assume its a girl.

Answer 3

You can tell several different ways the male s are usually smaller than the females and the females tend to be rounder due to the prescense of eggs. Males may have small white spots around their gill areas around spawning time as well.

Answer 4

Check this site out, it explains with pictures how to figure it out. http://www.bristol-aquarists.org.uk/goldfish/info/sexing-fs.htm

Answer 5

by take it to the veterinarian clinic and have the doctor take the goldfish blood test on the DNA it will tell if its a female or male fish .

Answer 6

near impossible when they are young----when older the females get a little broader toward the rear.

Answer 7

look under the glass

Answer 8

Lift up its skirt.

Answer 9

unless your a fish expert or go to one you don't........