Triportheus angulatus is one of the most widespread surface-adapted characins in South America, native to the Amazon and Orinoco river systems and their vast floodplains. Its body is strongly keeled ventrally and it possesses notably enlarged, wing-like pectoral fins that give it remarkable manoeuvrability at the surface. It is a shoaling species that feeds primarily at the water surface, taking fallen insects and floating seeds and plant material in the wild.
In the aquarium, Triportheus angulatus does well in groups of five or more in a tank of at least 300 litres with open surface swimming space, good filtration, and a tightly fitting lid. It is a notorious jumper. Water should be soft to moderately hard and warm. It is a peaceful surface feeder that coexists well with other mid-water and bottom-dwelling South American species, making it an excellent component of a large SA biotope.
Feeding is straightforward — it accepts floating pellets, dried insects, freeze-dried and frozen surface foods readily. Its angular keel-bodied profile and large pectoral fins give it an unusual and attractive appearance unlike typical tetras. It is an underused species in the hobby and a worthy addition to large SA community displays.
