Bubble-eyed goldfish develop their fluid-filled eye sacs at around three months old. To prevent eye injuries, you must be incredibly selective about aquarium decor when you set up the fish tank.

Known as a center of the goldfish industry, the city of Yatomi, Aichi Prefecture, is exploring a medical spinoff from the bubble eye goldfish. Experts believe the fluid in sacs beneath the eyes ...

The cartoonish Celestial Eye is similar to but not as large as the even weirder Bubble Eye goldfish. Farther into the aquarium, visitors get a cool top-view of fish inside unique clear encasements ...

Bubble-Eye Goldfish (Carassius auratus auratus) (AAP/Mary Evans/Ardea/Jean-Michel Labat) There's something a little fishy about this beauty pageant. Thousands of ...