So the PETA folks are claiming a 12 inch (30 centimeters) body length on a fish who biologists say only get 5.9 to 6.7 inches (15 to 17 centimeters) in body length. The average of 12 and 22 is 17 cm (6.7 inches). In the wild, per the USGS, goldfish attain a size of 12 to 22 centimeter, or 4.7 to 8.7 inches standard length (otherwise known as body length exclusive of the tail fin). So the ancestor of the goldfish averages 15 centimeters or 5.9 inches in body length (not including the tail). “ The crucian carp is a medium-sized cyprinid, typically 15 cm in body length” There is some debate on whether or not the Japanese Crucial Carp is the ancestor from which modern goldfish have evolved, but this has been debunked by a well-documented experiment in which gene sequences of goldfish were tested“ “ All modern goldfish are decedent from Chinese Crucial Carp. What is the truth about goldfish size? References are always useful: This is a classic case of an extremist view where they think the “end justifies the means”. These claims are simply designed to prevent keeping goldfish in ANY aquarium via ANY means necessary, including just out and out lies. The claims in this website are ALL completely fictional. This British site is obviously one of the many websites which front for PETA. Understand 30 centimeters SL equates to 12 inches SL or 15 inches total length for a common goldfish. auratus can reach 30 cm SL and live for 30 or 40 years meaning the hypothetical individual described above would not only be highly stunted in terms of growth but fail to reach a quarter of its potential age even if it survives for 5 or 6 years.” “For example a goldfish, Carassius auratus, maintained in a 30 cm x 20 cm aquarium may survive for a number of years and remain at a manageable size of a few centimeters in length, and initially this might seem a reasonable outcome. One commentator said two feet! The website out of England said: “Goldfish will be one foot in ponds” is a common refrain. One of the common threads to the PETA campaign against goldfish in aquariums has been hugely exaggerating the size a goldfish will ultimately grow to. Fancy Goldfish In Depth Analysis of Goldfish Size If you want a bit of a rant followed by a very long and boring analysis of the subject read on. In a large lake a common goldfish will normally grow to six inches with an occasional fish getting to eight inches. In a small aquarium a common goldfish will grow to possibly four inches and no greater. Size of Goldfish Goldfish Size In a Nutshell
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