Manú

The pygmy hatchetfish, Carnegiella myersi, is a tiny freshwater hatchetfish from the Peruvian Amazon basin, with a second population in Bolivia. The smallest and most delicate of the nominal hatchetfishes, it has a shallower, rounded keel that gives it an elongate profile. It lives in small, shaded, shallow forest streams and must be kept in a group of at least six, away from active tankmates.

The spotfin hatchetfish, Thoracocharax stellatus, is the most widespread neotropical hatchetfish, recorded from much of South America. It is told from its only congener, T. securis, by a prominent dark spot in the dorsal fin, and is sometimes traded as 'platinum hatchetfish'. It feeds almost entirely on insects, and a tightly fitting cover is needed because it can clear several metres in one jump.

C115 is an unidentified armoured catfish from the upper Río Madre de Dios in southern Peru, between Manú National Park and Puerto Maldonado. It was traded as both C115 and C116, now thought to be the same species, and fish sold as C. sp. 'Manu' variants may belong here too. It grows to around 70 mm SL and is highly variable in colour pattern, particularly in the extent of dark pigmentation on the front of the body.