Tocantins Tetra

About

Found in the Tocantins River basin of South America, this small characin, Hyphessobrycon stegemanni, has caused considerable confusion in the hobby because it is frequently mixed up with a closely related species, Hemigrammus ataktos, which shares the same river system and sports a similar dark lateral body stripe. The two can be told apart by fin shape in adult males. H. stegemanni does not develop the elongated dorsal and anal fins seen in H. ataktos. Along with differences in tooth cusp count and scale distribution on the caudal fin. Beyond the identification puzzle, this is actually a very easy fish to keep. It is thoroughly peaceful and does well in a community setup alongside other small characins, hatchetfishes, lebiasinids, smaller catfishes, and non-aggressive dwarf cichlids. Like most schooling tetras, it shows its best behavior and most natural coloration when kept in groups of eight or more, ideally with a mix of males and females. Adding other schooling species to the tank gives the whole group a greater sense of security and produces a livelier, more cohesive display. Breeding has not been documented in aquarium conditions, at least not in published sources. Its modest adult size and forgiving temperament make it a reasonable choice for newer fishkeepers comfortable with soft, slightly acidic South American setups.