Bryconops colanegra is a small, slender-bodied species of freshwater fish from South America, about 3.5 in (8.8 cm) long.

It has a black tail fin that bears hints of red, and its scales are dark along the back, transitioning to a silver belly.

[1] It has dark back scales that fade to a silvery belly, aside from a patch in the opercular and cheek region that bears definite pigmentation (something that also appears in congener B.

[2] The anal fin has a broad band of black along the base, which is a feature that B. colanegra does not share with any other members of the genus.

[2] The teeth are multicuspid, and the fish is equipped with a set of gill rakers that are notably denticulated - that is, covered in tooth-like protrusions.

[14] As it currently stands, however, B. colanegra is considered a species of least concern on the IUCN Red List, based upon a wide native range - the Caroní is the longest single river in Venezuela.

[17] Though little of B. colanegra's diet specifically has been studied, other members of the genus are known to be insectivorous, displaying differing preferences for invertebrates from various habitats.