Astyanax is een geslacht van straalvinnige vissen uit de familie van karperzalmen (Characidae).
Soorten Astyanax abramis Jenyns, 1842 Astyanax aeneus Günther, 1860 Astyanax ajuricaba Marinho & Lima, 2009 Astyanax alburnus Hensel, 1870 Astyanax altior Hubbs, 1936 – Yucatán tetra Astyanax altiparanae Garutti & Britski, 2000 Astyanax angustifrons Regan, 1908 Astyanax anterior Eigenmann, 1908 Astyanax aramburui Protogino, Miquelarena & López, 2006 Astyanax argyrimarginatus Garutti, 1999 Astyanax asuncionensis Géry, 1972 Astyanax atratoensis Eigenmann, 1907 Astyanax aurocaudatus Eigenmann, 1913 Astyanax bifasciatus Garavello & F. A. A. Sampaio, 2010 Astyanax bimaculatus Linnaeus, 1758 Astyanax biotae Castro & Vari, 2004 Astyanax bockmanni Vari & Castro 2007 Astyanax bourgeti Eigenmann, 1908 Astyanax brachypterygium Bertaco & Malabarba, 2001 Astyanax brevirhinus Eigenmann, 1908 Astyanax burgerai Zanata & Camelier, 2009 Astyanax caucanus Steindachner, 1879 Astyanax chaparae Fowler, 1943 Astyanax chico Casciotta & Almirón, 2004 Astyanax clavitaeniatus Garutti, 2003 Astyanax cocibolca Bussing, 2008 Astyanax cordovae Günther, 1880 Astyanax correntinus Holmberg, 1891 Astyanax courensis Bertaco, de Carvalho & Jerep, 2010 Astyanax cremnobates Bertaco & Malabarba, 2001 Astyanax daguae Eigenmann, 1913 Astyanax depressirostris Ribeiro, 1908 Astyanax dissimilis Garavello & Sampaio, 2010 Astyanax dnophos Lima & Zuanon, 2004 Astyanax eigenmanniorum Cope, 1894 Astyanax elachylepis Bertaco & Lucinda, 2005 Astyanax endy Mirande, Aguilera & Azpelicueta, 2006 Astyanax epiagos Zanata & Camelier, 2008 Astyanax erythropterus Holmberg, 1891 Astyanax fasciatus Cuvier, 1819 Astyanax fasslii Steindachner, 1915 Astyanax festae Boulenger, 1898 Astyanax filiferus Eigenmann, 1913 Astyanax gisleni Dahl, 1943 Astyanax giton Eigenmann, 1908 Astyanax goyacensis Eigenmann, 1908 Astyanax goyanensis Miranda-Ribeiro, 1944 Astyanax gracilior Eigenmann, 1908 Astyanax guaporensis Eigenmann, 1911 Astyanax guianensis Eigenmann, 1909 Astyanax gymnodontus Eigenmann, 1911 Astyanax gymnogenys Eigenmann, 1911 Astyanax hastatus Myers, 1928 Astyanax henseli de Melo & Buckup, 2006 Astyanax hermosus Miquelarena, Protogino & López, 2005 Astyanax integer Myers, 1930 Astyanax intermedius Eigenmann, 1908 Astyanax ita Almirón, Azpelicueta & Casciotta, 2002 Astyanax jacobinae Zanata & Camelier, 2008 Astyanax jacuhiensis Cope, 1894 Astyanax janeiroensis Eigenmann, 1908 Astyanax jenynsii Eigenmann, 1877 Astyanax jordanensis Vera Alcaraz, Pavanelli & Bertaco, 2009 Astyanax jordani Hubbs & Innes, 1936 – Cave tetra Astyanax kennedyi Géry, 1964 Astyanax kompi Hildebrand, 1938 Astyanax kullanderi Costa, 1995 Astyanax lacustris Lütken, 1875 Astyanax latens Mirande, Aguilera & Azpelicueta, 2004 Astyanax laticeps Cope, 1894 Astyanax leonidas Azpelicueta, Casciotta & Almirón, 2002 Astyanax leopoldi Géry, Planquette & Le Bail, 1988 Astyanax lineatus Perugia, 1891 Astyanax longior Cope, 1878 Astyanax longirhinus Garavello & F. A. A. Sampaio, 2010 Astyanax maculisquamis Garutti & Britski, 1997 Astyanax magdalenae Eigenmann & Henn, 1916 Astyanax marionae Eigenmann, 1911 Astyanax maximus Steindachner, 1877 Astyanax megaspilura Fowler, 1944 Astyanax mexicanus De Filippi, 1853 – Mexicaanse tetra Astyanax microlepis Eigenmann, 1913 Astyanax microschemos Bertaco & de Lucena, 2006 Astyanax minor Garavello & F. A. A. Sampaio, 2010 Astyanax multidens Eigenmann, 1908 Astyanax mutator Eigenmann, 1909 Astyanax myersi Fernández-Yépez, 1950 Astyanax nasutus Meek, 1907 Astyanax nicaraguensis Eigenmann & Ogle, 1907 Astyanax obscurus Hensel, 1870 Astyanax ojiara Azpelicueta & Garcia, 2000 Astyanax orbignyanus Valenciennes, 1850 Astyanax orthodus Eigenmann, 1907 Astyanax pampa Casciotta, Almirón & Azpelicueta, 2005 Astyanax paraguayensis Fowler, 1918 Astyanax parahybae Eigenmann, 1908 Astyanax paranae Eigenmann, 1914 Astyanax paranahybae Eigenmann, 1911 Astyanax paris Azpelicueta, Almirón & Casciotta, 2002 Astyanax pedri Eigenmann, 1908 Astyanax pelecus Bertaco & de Lucena, 2006 Astyanax pellegrini Eigenmann, 1907 Astyanax pirapuan Tagliacollo, Britzke, Silva & Benine, 2011 Astyanax poetzschkei Ahl, 1932 Astyanax puka Mirande, Aguilera & Azpelicueta, 2007 Astyanax pynandi Casciotta, Almirón, Bechara, Roux & Ruiz Díaz, 2003 Astyanax ribeirae Eigenmann, 1911 Astyanax rivularis Lütken, 1875 Astyanax robustus Meek, 1912 Astyanax ruberrimus Eigenmann, 1913 Astyanax rupununi Fowler, 1914 Astyanax saguazu Casciotta, Almirón & Azpelicueta, 2003 Astyanax saltor Travassos, 1960 Astyanax scabripinnis Jenyns, 1842 Astyanax schubarti Britski, 1964 Astyanax scintillans Myers, 1928 Astyanax serratus Garavello & F. A. A. Sampaio, 2010 Astyanax siapae Garutti, 2003 Astyanax stenohalinus Messner, 1962 Astyanax stilbe Cope, 1870 Astyanax superbus Myers, 1942 Astyanax symmetricus Eigenmann, 1908 Astyanax taeniatus Jenyns, 1842 Astyanax totae Ferreira Haluch & Abilhoa, 2005 Astyanax trierythropterus Godoy, 1970 Astyanax troya Azpelicueta, Casciotta & Almirón, 2002 Astyanax tumbayaensis Miquelarena & Menni, 2005 Astyanax tupi Azpelicueta, Mirande, Almirón & Casciotta, 2003 Astyanax turmalinensis Triques, Vono & Caiafa, 2003 Astyanax unitaeniatus Garutti, 1998 Astyanax utiariti Bertaco & Garutti, 2007 Astyanax validus Géry, Planquette & Le Bail, 1991 Astyanax varzeae Abilhoa & Duboc, 2007 Astyanax venezuelae Schultz, 1944 Astyanax vermilion Zanata & Camelier, 2009 Astyanax villwocki Zarske & Géry, 1999 Astyanax xavante Garutti & Venere, 2009