| Prognathodes geminus | |
|---|---|
 | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Acanthuriformes |
| Family: | Chaetodontidae |
| Genus: | Prognathodes |
| Species: | P. geminus |
| Binomial name | |
| Prognathodes geminus | |
Prognathodes geminus, the twin butterflyfish, is a species of butterflyfish, a marine ray-finned fish in the family Chaetodontidae. It is found in the western-central Pacific, around Caroline Island and Palau Island.