Types of Goldfish Goldfish come in an array of colors and shapes. A few of the 'fancy' varieties include fantails, black moors, and Orandas. These fish have heavy, oval shaped bodies, and some types feature elaborate flowing tails. Their coloring can be solid black, bright gold, white, shades of brown, or variegated hues. In the home aquarium, most fancy goldfish can easily reach six to eight inches in length, not including their tails.
Comets are easy to find in almost any pet store and are usually inexpensive.
Similar to them in body shape are the 'common' goldfish. These are often sold as feeder fish. Both these types of goldfish have more slender bodies than the fancy varieties, but require more tank room. It is for this reason that it is important to house them in as large a tank as possible. There are many other interesting varieties of goldfish.