Common Carp
The common carp or European carp (Cyprinus carpio) is a widespread freshwater fish of eutrophic waters in lakes and large rivers in Europe and Asia.[2][3] The native wild populations are considered vulnerable to extinction by the International Union for Conservation of Nature (IUCN),[1] but the species has also been domesticated and introduced (see aquaculture) into environments worldwide, and is often considered a destructive invasive species,[2] being included in the list of the world's 100 worst invasive species. It gives its name to the carp family, Cyprinidae.
Wild common carp are typically slimmer than domesticated forms, with body length about four times body height, red flesh, and a forward-protruding mouth. Common carp can grow to very large sizes if given adequate space and nutrients. Their average growth rate by weight is about half the growth rate of domesticated carp[15][16] They do not reach the lengths and weights of domesticated carp, which (range, 3.2–4.8 times)[2] can grow to a maximum length of 120 centimetres (47 in), a maximum weight of over 40 kilograms (88 lb),[2] and an oldest recorded age of 38 years.[2] The largest recorded carp, caught by an angler in January 2010 at Lac de curtons (Rainbow Lake) near Bordeaux, France, weighed 42.6 kilograms (94 lb).[17] The largest recorded carp, caught by British angler, Colin Smith, in 2013 at Etang La Saussaie Fishery, France, weighed 45.59 kilograms (100.5 lb). The average size of the common carp is around 40–80 cm (15.75-31.5 inches) and 2–14 kg (4.5-31 lb).
Although tolerant of most conditions, common carp prefer large bodies of slow or standing water and soft, vegetative sediments. As schooling fish, they prefer to be in groups of five or more. They naturally live in temperate climates in fresh or slightly brackish water with a pH of 6.5–9.0 and salinity up to about 0.5%,[18] and temperatures of 3 to 35 °C (37–95 °F).[2] The ideal temperature is 23 to 30 °C (73–86 °F), with spawning beginning at 17 to 18 °C (63–64 °F); they easily survive winter in a frozen-over pond, as long as some free water remains below the ice.[18] Carp are able to tolerate water with very low oxygen levels, by gulping air at the surface