Adult goldfish will eat baby goldfish when they are placed in the same tank. Goldfish females will also eat the eggs as soon as the male has fertilized them, so it’s a good idea to remove her and the male from the tank o... More »

Goldfish lay eggs that are amber in color and look slightly transparent. If the eggs turn white, they are infertile and do not hatch into goldfish. More »

While goldfish will eat crustaceans, insects, plants and smaller fish in the wild, those that are kept as household pets most often eat commercially made goldfish food. This can be safely supplemented with shelled peas, ... More »

Although there is little proof, rare cases have indicated the possibility of cannibalism in goldfish. The National reported an incident in which goldfish ate other fish after an earthquake, leaving them of food for an ex... More »

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Goldfish may stop eating due to overfeeding, boredom with their food, stress or sickness. Poor water quality or a stressful environment can also make fish avoid food. More »

Goldfish babies, or fry, change from black or dark-gray at birth to a golden color by age one. Environmental factors influence the degree of color they achieve. More »

Goldfish eat smaller fish as long as they fit in the goldfish's mouth. Goldfish do not have a picky diet. They eat a lot and go for whatever they can find that will fit in their mouth. This includes everything from fish ... More »