Sharp-snouted piranha

The sharp-snouted piranha (Serrasalmus sanchezi) is a small freshwater ray-finned fish in the family Serrasalmidae, the group that holds the pacus, piranhas and their relatives. It is endemic to Peru, where FishBase places it in the Ucayali River basin, and it belongs to the Serrasalmus rhombeus species complex. Wikipedia gives its maximum size as about 18 centimetres, while FishBase records a maximum standard length of 11.4 centimetres, so published figures differ. Many individuals show a red throat, similar to that of the red-bellied piranha Pygocentrus nattereri. It is also called the ruby-throated diamond piranha or the ruby-red piranha, and the second name is shared with the speckled piranha Serrasalmus spilopleura, so the common names can cause confusion. The scientific name was given by the French ichthyologist Jacques Gery in 1964, and the species name honours Jorge Sanchez Romero, a Peruvian fisheries biologist who studied Amazon fishes. The International Union for Conservation of Nature rated it Least Concern in 2014, and FishBase lists it as harmless to people.