bubble eye –
The most intriguing feature of the Bubble Eye Goldfish is its bubbles. The bubbles on this goldfish begin to develop when it is 6-9 months old, leading to the name Water-Bubble Eye. By the time these goldfish are 2 years old, the bubbles are very large. These water-filled bubbles actually get so big that they can even make it difficult for this fish to see and swim.