The goldfish is a freshwater fish and is one of the most common aquarium fish. Goldfish breeds vary in size and color which and are known to exist in combinations of white, yellow, brown, orange, red and black colors. Goldfish varies in scale coloring and size and therefore, they look unique as they are specifically bred to look unique. Goldfish are available in many colors other than just gold such as yellow, bronze, blue and black. Also, they have color mixture in scales. Characteristics
Goldfish is one of the most researched species of fish found on this planet.The studies have found some of the following distinct characteristics of goldfish.
They are great learners and can demonstrate their cognitive skills by identifying their owners. The memory span of goldfish is believed to last for three months The fish have the capacity to distinguish between colors, shapes and sounds. Goldfish responds to positive reinforcement and can tell feeding times in advance.