Question about common goldfish

I just bought two regular common goldfish yesterday, but when I brought them home I realised that one goldfish has a darker orange then my others. Could it be that it could be a male and my others could be female?

 

Probably not. Sex can't be determined by color in goldfish.

Pretty much the only way to sex goldfish is to look for breeding tubercles. They are little white bumps that will appear on the gill and edges of fins of males but only when they're ready to breed. You can also look at the vent area. Females will have a small bump there. But it's really difficult to see so unless you have a lot of experience sexing goldfish, you're probably not going to be able to do it accurately.

Also, I hope you know that common goldfish can get over a foot long and will need at least 50 gallons each (which is why they're really not suitable for aquariums).

-Chelle