The Bubble Eyed Goldfish is considered one of the many varieties of fancy goldfish that we currently know of. They are a delicate and unique type of goldfish that are also one of the easiest breeds to identify.
The Bubble Eyed Goldfish are the only goldfish breed that develops large fluid filled bubbled (or sacs) under their eye.
This abnormality first appears around the age of three months and will continue to grow until the goldfish is about two years old. Not only are these goldfish equipped with fluid filled sacs on their faces but, they are also unique in that they lack a dorsal fin.
The combination of these two physical traits creates not only a delicate fish but also a slow swimming fish.