Prognathodes geminus
Prognathodes geminus, the twin butterflyfish, is a species of marine ray-finned fish, a butterflyfish belonging to the family Chaetodontidae. It is found in the Western Central Pacific, around Caroline Island and Palau Island. This species reaches a length of . References

geminus
Taxa named by Joshua M. Copus
Taxa named by Richard Pyle
Taxa named by Brian Greene
Taxa named by John Ernest Randall
Fish described in 2019