Goldfish are a popular type of fish that are often kept as pets. They are usually orange or gold in color, but they can also be white, black, or even blue. Goldfish are easy to care for and can live for 10-15 years if they are well taken care of. They do best in aquariums that are at least 20 gallons in size and have a filter and some live plants. Goldfish are omnivorous and eat both plant and animal matter. They should be fed a quality goldfish food pellets as well as fresh vegetables and live/frozen foods.