Goldfish is most common aquarium fish. Family –Cyprinidae of order Cypriniformes. Scientific Name – Carassius auratus auratus. First domesticated in China thousands of year ago Different combination of colours of Goldfish available — yellow, red, brown, orange and black Common varieties in aquarium Single Tailed Goldfish 1>Comets– long thin single fin. 2>Commons–short sleek tail fin. […]