Enneapterygius fuscoventer
Enneapterygius fuscoventer
- Least concern
- Card rarity: Common
- Fish

The blackbelly triplefin is a species of triplefin blenny in the genus Enneapterygius, described by German ichthyologist Ronald Fricke in 1997 and known from the western Pacific Ocean.
Classification
- Class
- Actinopterygii
- Order
- Blenniiformes
- Family
- Tripterygiidae
- Genus
- Enneapterygius