History
Goldfish originated from a species of fish called the Crucian carp. No one knows for certain when they were domesticated, but ancient Chinese art and literature suggests they have been kept in Chinese homes since 800 AD. Goldfish became widespread in many other countries in the Far East after 1650. At this time, Europeans were trading with the East and brought goldfish back to Europe with them. At first, goldfish were kept in outside ponds and were not housed indoors until the late 1800s.

Life span
The average lifespan of a goldfish is 5-10 years.

Distribution and Habitat in the wild
Goldfish (Carassius auratus) range from Eastern Europe across to China and inhabit well-vegetated pools and lakes.

Behaviour in the wild
Goldfish breed in the summer and many males chase one female in desperation to fertilise her. They spawn (distribute the fertilised eggs) over aquatic vegetation, and the eggs hatch after about a week. Goldfish feed on crustaceans, insect larvae, molluscs and some vegetation.