Prognathodes geminus

{{Short description|Species of fish}}

{{Speciesbox

| image = Prognathodes geminus (10.3897-zookeys.835.32562) Figure 1.jpg

| status =

| status_system =

| status_ref =

| taxon = Prognathodes geminus

| authority = Copus, Pyle, Greene & Randall, 2019

| synonyms =

| synonyms_ref =

}}

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.