n = 4
| Scientific Name | Author | Valid Name | Family | English Name |
|---|---|---|---|---|
| Acanthicus adonis | Isbrücker & Nijssen, 1988 | Acanthicus adonis | Loricariidae | |
| Acanthicus blainvillii | (Risso, 1827) | Squalus blainville | Squalidae | Longnose spurdog |
| Acanthicus canensis | Meek & Hildebrand, 1913 | Leptoancistrus canensis | Loricariidae | |
| Acanthicus hystrix | Spix & Agassiz, 1829 | Acanthicus hystrix | Loricariidae |