Biotoecus is a fish genus of cichlids from northern South America where one species (B. dicentrarchus) is found in the Orinoco Basin and the other (B. opercularis) occurs in the northern part of the Amazon Basin. These small cichlids do not surpass 10 cm (3.9 in) in length.
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset https://doi.org/10.15468/39omei accessed via GBIF.org on 2023-06-13; License: CC BY 4.0