This is a report on endoparasitism in the marine fish lane snapper, Lutjanus synagris (Osteichthyes: Perciformes: Lutjanidae) by the nematode, Philometra sp. The fish samples were netted and examined during January to April 2008. Of the nine fish examined, two female fish hosts were parasitized by the nematode Philometra sp. The parasites were found attached on the surface and inside the ovarian tissue of mature female fish. The parasitic prevalence was 22.22%, mean intensity was 13 parasites per infected fish and mean density was 2.89 per host-sampled parasite. The location preferred by the parasitic nematode Philometra sp. was the ovary of the hosts.
