Maximum size: 90cm/35” aquarium, 120cm/47” wild.
Feeding: Slight omnivore with heavy carnivore leanings. Fish, prawns, mussel, cockle, all insect matter, crab, squid, even some lean terrestrial meats will be taken.
Water chemistry: Acidic water, pH ranging from 5.8 to 7.0, hardness below 14°DH.
Distribution: Black and white water floodplains of Brazil, Peru, French Guiana. Introduced elsewhere by humans.
Difficulty level: Juveniles easy, adults extremely hard.