Goldfish
Pictures

Goldfish - "Red Cap Oranda" among plants in a fish tank.

Chinese shubunkin goldfish in cold water aquarium.

Goldfish belong to the Cyprinidae family and the Carassius genus

Bubble eye goldfish in an aquarium.

The fry of the goldfish in a grow-out tank.

Black moor goldfish, Carassius auratus, in front of white background.

Goldfish kept as pets usually grow no longer than 3 inches, but they can grow to over 16 inches in size and weigh over 9 pounds.

Goldfish have four types of cone cells in their eyes. These cone cells are sensitive to red, green, blue, and ultraviolet light.