Aphyocharacidium

Aphyocharacidium is a genus of small South American freshwater fish belonging to the family Characidae. These fish are commonly known as tetras or characins, a diverse group characterized by their small size, schooling behavior, and often vibrant coloration. The genus Aphyocharacidium was described by the ichthyologist George Sprague Myers in 1927. Members of this genus are native to the Amazon and Paraná river basins, inhabiting slow-moving streams, flooded forests, and marginal habitats. They are typically small, rarely exceeding 3 to 4 centimeters in standard length, and possess a laterally compressed body. Their coloration can vary but often includes iridescent scales and sometimes a prominent lateral stripe. Aphyocharacidium species are omnivorous, feeding on small invertebrates, algae, and detritus. As with many tetras, they are schooling fish and are best kept in groups to exhibit their natural behaviors. They are sometimes found in the aquarium trade but are not as widely available as more common tetra species. The genus is distinguished by specific morphological characteristics, including fin ray counts and vertebral counts, which differentiate them from closely related genera within the Characidae family. Further research continues to refine the taxonomy and understanding of the ecological roles of Aphyocharacidium species.