Scopaeocharax is a genus of miniature tetras in family Characidae, found in the upper Amazon drainages of Peru, Colombia, and Ecuador. The atlas covers 2 species, and they rank among the smallest characins on record - both top out under 1 in, with the smallest reaching only about 1 in. That diminutive size, paired with a slender, compressed body, is the genus's defining trait; fish this small typically live in shallow forest-stream margins and leaf litter rather than open water.
This is not a genus the aquarium trade markets by name - it is essentially unknown outside specialist collections and ichthyological survey work, and the local common name recorded for S. rhinodus (mojarita, a generic Spanish word for small fish) underlines how little dedicated attention these species have received. Both atlas species carry a Least Concern IUCN assessment, so there is no acute conservation flag here, though as with many small-range Amazonian headwater fish, that status rests on a thinner body of survey data than a comparable temperate species would have.