Types Of Goldfish - The Goldie Identification Guide ' Welcome to the wonderful world of goldfish keeping! Goldies have been delighting their owners for thousands of years, even though the first goldfish didn’t possess the bulging eyes and fancy fins that we have grown to love. Goldfish continue to become more and more popular due to their forgiving nature and spectacular shapes and colors. But with such an array of unique breeds, how do you know which goldfish you have? This blog will discuss the types of goldfish, and which one may be best for you and your tank. Single Tailed Goldfish These goldfish are the closest in resemblance to their wild cousins, the Prussian carp. Besides the obviously brighter pigmentation, common goldfish have the same semi stocky body, short rounded fins, and hardy nature as the carp do. As they mature, common goldfish will develop a distinguishable “hump” on their backs. Called Hibuna in Japan, common goldfish are often labeled as “f...