Tambopata

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.

Hyphessobrycon eschwartzae is a small, laterally-striped characid known only from the Río Madre de Dios watershed in southeastern Peru. It has been collected in the Tambopata National Reserve and north of Puerto Maldonado. Lima et al. (2014) placed it in a narrowly defined H. heterorhabdus group with H. heterorhabdus and H. amapaensis, marked by a dark midlateral stripe, a red stripe above it and a red upper half to the eye.