Bryconops colaroja is a small species of fish endemic to tributaries and creeks of the Cuyuni River basin in Venezuela.

The uniform gradient of the scales, lacking prominent markings, is a feature that can be used to differentiate it from other members of the genus; for example, B. colanegra and B. melanurus have distinct blotches of pigmentation in the cheek and eye region.

[12][13] However, research in 2011 by Oliveira et al. moved the genera Bryconops, Iguanodectes, and Piabucus to the family Iguanodectidae,[14] which is where B. colaroja currently stands.

[16] The diet of Bryconops colaroja hasn't been the subject of extensive study on its own, but other members of the genus are known to be largely insectivorous, and have noted preferences for invertebrates of various origins.

[1] A potential threat is that the Cuyuni River main is regularly threatened by mining activity; the waters have been disturbed and riverbanks destroyed in the past, as it is a source of gold.

[20] The Cuyuni river is generally in poor health, which places B. colaroja (as well as the other native species) at an increased risk of endangerment.