n = 18
| Scientific Name | Author | Valid Name | Family | English Name |
|---|---|---|---|---|
| Hydrocynus brasiliensis | Cuvier, 1816 | Salminus brasiliensis | Bryconidae | Dorado |
| Hydrocynus brevis | (Günther, 1864) | Hydrocynus brevis | Alestidae | Tiger-fish |
| Hydrocynus cuvieri | (Spix & Agassiz, 1829) | Boulengerella cuvieri | Ctenoluciidae | |
| Hydrocynus forskahlii | (Cuvier, 1819) | Hydrocynus forskahlii | Alestidae | Elongate tigerfish |
| Hydrocynus forskahlli | (Cuvier, 1819) | Hydrocynus forskahlii | Alestidae | Elongate tigerfish |
| Hydrocynus forskali | (Cuvier, 1819) | Hydrocynus forskahlii | Alestidae | Elongate tigerfish |
| Hydrocynus forskalii | (Cuvier, 1819) | Hydrocynus forskahlii | Alestidae | Elongate tigerfish |
| Hydrocynus forskhalii | (Cuvier, 1819) | Hydrocynus forskahlii | Alestidae | Elongate tigerfish |
| Hydrocynus goliath | Boulenger, 1898 | Hydrocynus goliath | Alestidae | Giant tigerfish |
| Hydrocynus hujeta | (Valenciennes, 1850) | Ctenolucius hujeta | Ctenoluciidae | Gar characin |
| Hydrocynus lineatus | (Schlegel, 1863) | Hydrocynus vittatus | Alestidae | Tiger fish |
| Hydrocynus longipinnis | (Steindachner, 1876) | Boulengerella cuvieri | Ctenoluciidae | |
| Hydrocynus lucius | Cuvier, 1816 | Boulengerella lucius | Ctenoluciidae | Golden pike-characin |
| Hydrocynus maculatus | (Valenciennes, 1850) | Boulengerella maculata | Ctenoluciidae | Spotted pike-characin |
| Hydrocynus somonorum | (Daget, 1954) | Hydrocynus brevis | Alestidae | Tiger-fish |
| Hydrocynus tanzaniae | Brewster, 1986 | Hydrocynus tanzaniae | Alestidae | Tanzanian tigerfish |
| Hydrocynus vittatus | Castelnau, 1861 | Hydrocynus vittatus | Alestidae | Tiger fish |
| Hydrocynus vittiger | Boulenger, 1907 | Hydrocynus goliath | Alestidae | Giant tigerfish |