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dfish (Carassius auratus auratus) was one of the earliest fish to be domesticated, and is still one of the most commonly-kept aquarium fish. A relatively small member of the carp family (which also includes the Koi carp and the Crucian carp), the goldfish is a domesticated version of a dark-gray/olive/brown carp native to East Asia (first domesticated in China) that was introduced to Europe in the late 17th Century. It may grow to a maximum length of 23 inches (59.0 cm) and a maximum weight of 6.6 lb (3.0 kg), although this is rare; most individuals grow to under half this size. See more at Wikipedia.org...