Aphyocharax is a genus of freshwater ray-finned fishes, characins, belonging to the family Characidae. The fishes in this genus are from South America, specifically the Amazon, Orinoco, Essequibo, Paraguay and Paraná basins.

Species: Aphyocharax contains the following valid species:

• Aphyocharax agassizii (Steindachner, 1882)
• Aphyocharax anisitsi C. H. Eigenmann & C. H. Kennedy, 1903 (bloodfin tetra)
• Aphyocharax avary Fowler, 1913
• Aphyocharax brevicaudatus Brito, Guimarães, Carvalho-Costa & Ottoni, 2019
• Aphyocharax colifax Taphorn & Thomerson, 1991
• Aphyocharax dentatus C. H. Eigenmann & C. H. Kennedy, 1903
• Aphyocharax erythrurus C. H. Eigenmann, 1912 (flame tail tetra)
• Aphyocharax gracilis Fowler, 1940
• Aphyocharax nattereri (Steindachner, 1882) (dawn tetra)
• Aphyocharax pusillus Günther, 1868
• Aphyocharax rathbuni C. H. Eigenmann, 1907 (redflank bloodfin)
• Aphyocharax yekwanae Willink, Chernoff & Machado-Allison, 2003