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.
Biotoecus is a fish genus of cichlids from northern South America where one species (B. dicentrarchus) inhabits the Orinoco Basin and the other (B. opercularis) is found in the northern part of the Amazon Basin.