The objective of this work was to identify the species of parasitic nematodes that infect the gonads of female “birdfish” Hyporhamphus naos Banford & Collette, 2001 (Hemiramphidae: Beloniformes). This species of fish is considered key in terms of the local artisanal fishery index, it is economically transcendental for fishermen and regional consumers who annually wait for its arrival in the bay to be consumed. The nematode Philometra Costa, 1845 (Nematoda: Philometridae) was identified parasitizing the female gonads of H. naos. Two immature female nematodes were found (prevalence 8%, mean abundance 0.08 and mean intensity 1). New information is recorded on the distribution of parasitic nematodes of this genus in this area of ​​the tropical Pacific and a new host. This is the first record of Philometra parasitic on female gonads in H. naos fish in Mexico. The first world recor...

Fishing is a vital and productive activity worldwide, contributing significantly to food security and food production. Sinaloa, Mexico, is a fishing city with a diverse range of crustacean and fish species that inhabit its coastal waters. However, little is known about its parasitofauna, a crucial aspect for preventing zoonotic diseases. The objective of this study was to compile a list of fish parasitofauna from two coastal areas in southern Sinaloa during two years of student service in the Bachelor's degree programs in Fisheries and Aquatic Sciences, Facultad de Ciencias del Mar (FACIMAR), Universidad Autónoma de Sinaloa, Mazatlán, México. During the 2022-2024 period, 290 fish were collected from two different regions of southern Sinaloa: Mazatlán and Walamo, as part of academic and community service activities. The fish species collected were “chihuil” (Bagre panamensis, Gill...