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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]
It includes more than 90 species. The name means "serrated salmon family", which refers to the serrated keel running along the belly of these fish. Fish classified as Serrasalmidae are also known by these common names: pacu, piranha, and silver dollar. These common names generally designate differing dental characteristics and feeding habits. [2]
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]
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 ...
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 ...
Pygopristis denticulata, also known as the lobetoothed piranha, is a species of piranha. [1] It is a rare South American characiform fish found in the Orinoco River basin, rivers of the northern and eastern Guiana Shield , and tributaries of the lower Amazon River . [ 2 ]
Serrasalmus is a genus of piranhas. They are collectively known as pirambebas; the "typical" piranhas like the piraya piranha are nowadays placed in Pygocentrus. Like all piranhas, Serrasalmus are native to South America. These fish are predatory, have sharp teeth and generally have a rhomboid shape.