The endohelminth parasite fauna of the teleost fish Labrisomus philippii, the “trambollo” (Labrisomidae), from the central Peruvian coast is quantitatively described. The assemblage was composed of 7 species: the adult digeneans Helicometra fasciata (Rudolphi, 1819), Zoogonus rubellus (Olsson, 1868), Prosorhynchus Odhner, 1905 sp., and Bucephalopsis (Diesing, 1855) sp.; metacercariae of Bucephalus Baer, 1826, sp.; and the larval Lacistorhynchus tenuis (van Beneden, 1858) (Eucestoda) and Corynosoma australe Johnston, 1937 (Acanthocephala). Up to 98% of the fish were parasitized. The highest prevalence was shown by Z. rubellus (74%) and the highest mean intensity by Bucephalopsis sp. (103.7). No common pattern of infection as a function of host body size or sex was noted. The major characteristic of the endohelminth community of L. philippii was the richness of digeneans compared with those of other marine fishes in this geographical area. This richness may be a consequence of abiotic factors particular to the Peruvian Faunistic Province.