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The state of Arizona first placed native fish on the endangered species list in 1988; however, detrimental human activities including aquifer pumping, reduction in stream flows, and predation from non-native green sunfish, have acted as major contributing factors to the decline of these native species.
Piranhas are "basically like regular fish with large teeth". [19] A few other species may also occur in large groups, while the remaining are solitary or found in small groups. [3] Although popularly described as highly predatory and primarily feeding on fish, piranha diets vary extensively, [3] leading to their classification as omnivorous. [4]
Pacu (Portuguese pronunciation:) is a common name used to refer to several species of omnivorous South American freshwater serrasalmid fish related to piranhas.Pacu and piranha do not have similar teeth, the main difference being jaw alignment; piranha have pointed, razor-sharp teeth in a pronounced underbite, whereas pacu have squarer, straighter teeth and a less severe underbite, or a slight ...
How dark the fish become depends on the local water conditions; fish in Peru appear to be the darkest and may be almost jet black. [2] The maximum recorded fish measurement standard length is 41.5–61 centimetres (16.3–24.0 in), [ 1 ] [ 3 ] although a more normal length is around 32 centimetres (13 in), [ 2 ] and they attain a maximum weight ...
Characiformes / ˈ k æ r ə s ɪ f ɔːr m iː z / is an order of ray-finned fish, comprising the characins and their allies. Grouped in 18 recognized families, more than 2000 different species are described, including the well-known piranha and tetras. [1]
While studying piranhas and pacus in an effort to better assess vital fish biodiversity in the 4,000-mile-long (6,400-kilometer-long) river, an international team of researchers has found and ...
Serrasalmus geryi, known as the violet line piranha or Gery's piranha, is a species of piranha of the family Serrasalmidae. It is found in the lower Tocantins and Araguaia Rivers of Brazil . [ 1 ] [ 2 ] The species is notable for being the one of only the members of the genus Serrasalmus that can coexist with others of the same species in ...
List of Lepidoptera of Arizona; F. List of fishes native to Arizona; L. List of fauna of the Lower Colorado River Valley; M. List of mammals of Arizona; R.