Unsure about gender of current fish
So I want to get a second goldfish in the next few months. But I'm unsure of the sex of my current fish. I named it Jack and assumed it male, because I just wanted to name it after my favorite video game character. But I'm actually unsure.
At the pet store it didn't have them separated male or female. They just had the one tank for the Calico Telescope Eyed Goldfish. When I get the second fish, I don't want to end up with more fish (don't have the space or money for anything bigger than a 55 gallon).
What are some characteristics of the genders of fish to see? I'll include pictures if I need to.
Gracie - Female Calico Cat - 7.5 years old
Reggie - Black Lab - 7 years old
Duke - Yellow Lab - 6 years old
Jack - Telescope Eyed Goldfish - 8 months