Author: Agassiz, 1831
Remark: Redescription based on Peruvian material in Kullander (1986:1), with diagnosis, description, distribution and illustrations.
Comments: Specimens collected were from flood prone areas, but in the Amazon the biotopes are more varied.  This fish forays along the shore where small fishes may be concentrated.  Juveniles feed on shrimps, while adults are almost exclusively piscivore.  Oviparous (Ref. 205).  Males are sexually mature after one year while females mature after two years.  During reproduction which is not markedly seasonal, large males develop a frontal hump and become territorial (Ref. 35237).  Maximum length 80 cm TL (Ref. 35237).