The piranha

The piranha or pirana is a member of the Characidae family in the Characiformes order, and omnivorous freshwater fish inhabiting the rivers of South America. In Venezuela, and called caribes. Are known for their teeth sharp and voraciousappetite for meat.Piranhas belong to the species Serrasalminae, which also includes closely related to the voracious fish. such as pacus. Traditionally, only four races Pristobrycon, Pygocentrus, and Serrasalmus Pygopristis is true that the Piranhas, because of the specializedteeth. However, a recent analysis showed that if the piranha group is to be precursors, should be restricted to Serrasalmus, and part of the Pygocentrus Pristobrycon, or extended to include these items in addition to Pygopristis, Catoprion and striolatus Pristobrycon. Pygopristis was found to be more closely Catoprion other piranha species of the three.

The total number of piranha species is unknown and disputed, and new species are still described. Estimates range from 30 to less than found on more than 60.Piranhas in the Amazon basin, the Orinoco, in rivers of Guyana, Paraguay and Parana, and Sao Francisco River systems. Some species of piranha and a wide geographic ranges, occurring in more than one of the major basins mentioned above, while the other seems to be more limited distributions.

It introduced Piranhas Basin to parts of the United States, with the samples found in some cases in the Potomac River, and Lake of the Ozarks in Missouri, and even as far north as Lake Winnebago in Wisconsin, although they usually do not survive the cold winter.has also been the discovery of piranhas in the Kaptai Lake in southeastern Bangladesh. Research is being conducted to determine how Piranhas moved to the far corners of this kind in the world of the native. It is believed that some rogue exotic fish traders have released them in the lake to avoid falling by forces antipoaching.