Common Goldfish
The common goldfish is the classic straight-bodied pet goldfish, a domesticated Carassius auratus with normal eyes, a single tail, and no exaggerated body features. It differs from a comet mainly in tail length: common goldfish have a shorter, simpler caudal fin and a stockier profile. Colors include orange-gold, red and white, yellow, white, bronze, black, calico, and occasional matte or nacreous finishes, with many juveniles changing color as pigment develops. The form is widely kept because it is vigorous and easy to recognize, not because it stays small.
Good care is closer to small pond fish management than to the old bowl stereotype. A common goldfish can reach well over hand length, produces heavy waste, and benefits from cool, well-oxygenated water with room to cruise. In ponds it grazes algae and invertebrates but still needs balanced feeding and protection from predators. Spawning is usually triggered by seasonal temperature changes, with sticky eggs scattered through plants or mops. Buyers should plan for adult size and avoid releasing unwanted fish, since common goldfish survive in many natural waters.
Colors: Black, Black and Orange, Black and White, Blue-Gray, Brown, Calico, Chocolate, Gold, Lavender, Matte, Metallic, Nacreous, Orange, Panda, Red, Red and White, White, Yellow
