how do i tell if my goldfish is a male or female?

Question

how do i tell?

Answer 1

This is difficult to tell, unless your fish are at least a year old, and they're in spawning condition. Males will get pimple-like bumps on their gill covers and along the front edges of their fins. There's also a difference in the shape of their vents. This link has photos showing these characteristics: http://www.bristol-aquarists.org.uk/goldfish/info/sexing-fs.htm

Other websites claim you can tell the difference by using characteristics such as a "mid-line ridge", fin shape, and others, but unless you have fish that are the same age and variety, these won't work that well (and even if they are the same, these are iffy, and should only be used with much experience and observation).

Answer 2

during the breeding season, the males will have white dots on their heads, gill plates, and petcoral fin rays.

Females are generally fatter.

They wont breed until they are over a year old, and during the spring months. Spawning mops, 100+ gallon tank, and a group is the key for breeding goldfish,

Answer 3

as a general rule, females are likely to be bigger than the males of the same age.When they reach spawning age, and the eggs begin to mature in the female fish, she will thicken in the ventral area. the male will start to develop small white tubercles on his gill plates and on the leading rays of his fins, particularly on the first ray of the pectoral fin

it deals with the undesides of their bodies see this site listed.

Answer 4

who knows how to tell???? not me. ask petco