Abstract
The male of an unknown species of Pennellidae is described based on a single specimen parasitic on the branchial lamellae of the limpid-wing flyingfish Cheilopogon unicolor (Valenciennes, 1847) (Pisces, Exocoetidae). The male has a 1-segmented abdomen and biramous legs 1 and 2, as well as uniramous legs 3 and 4; the rami of all legs are 2-segmented.