Goldfish is one of the most popular aquarium fish.
It is a freshwater fish which is kept as a pet in indoor aquariums.
They have a lifespan averaging about 10-15 years, with some varieties living up to 30 years.
Their lifespan can also be reduced if they are not kept in clean water.
They come in a variety of colours including red, orange, blueish-grey, brown, yellow, white, and black.
They are omnivores, eating both plants and animals.
Various types of goldfish include the Comet goldfish, the Shubunkin goldfish and the Tamasaba goldfish.
Goldfish do not have any teeth or barbel sensory organs, so cannot taste food.
They have a memory-span of at least three months and can distinguish between different shapes and colours.
Goldfish live and sleep with their eyes open, because they don’t have eyelids.