Goldfish are interesting creatures. They are one of the most common fish kept in aquariums. They belong to the family of fish called carp. Carps are very popular fishes in CHINA. Initially they were silver coloured, but when one was born with golden colour on it, people started to breed the golden variety.
Goldfish can grow to almost as long as ruler of 6 inches and can live for 6 to 8 years.
People like to keep colour goldfish in ponds. They are not expensive to buy. Some can live for a short time in ponds with ice surface. Goldfish need to be kept in ponds or a tank with filter to clear away waste and keep the water clean. Sometimes snails can be added to the pond or tank to eat the algae that grows. Special goldfish food should be fed to the goldfish.