Angelfish are cataloged in one of the largest families of vertebrates known to science. The family Cichlidae encompasses over 1,300 scientifically classified species in 220 assorted genera. New species are found and identified every year. It is estimated that there may be as many as 3,000 species that fall within the scientific classification of this family. This family, more commonly known as cichlids, also includes oscars, discus and tilapias. Many sources will tell you that angelfish are indigenous to the Amazon River. While this is true, this species is also native to the Orinoco River and Essequibo River basins. Substantial populations of this species exist throughout Guyana, Venezuela, and Columbia in addition to Brazil.