n = 4
| Scientific Name | Author | Valid Name | Family | English Name |
|---|---|---|---|---|
| Chuco axelrodi | Fernández-Yépez, 1971 | Hypselecara coryphaenoides | Cichlidae | |
| Chuco godmanni | (Günther, 1862) | Chuco godmanni | Cichlidae | Southern checkmark cichlid |
| Chuco intermedium | (Günther, 1862) | Chuco intermedium | Cichlidae | Northern checkmark cichlid |
| Chuco microphthalmus | (Günther, 1862) | Chuco microphthalmus | Cichlidae |