Аннотация:Mangroves of the Persian Gulf are represented by only two species, one of them, Rhizophora mucronata, is on the western edge of the area of distribution and occurs only on the shores of the Strait of Hormuz; the second species, Avicennia marina, enters into the inner parts of the Gulf. Both species occur on the shores of Qeshm Island, where quantitative samples on meiobenthos were collected in 2021 at nine stations in five sites. A standard sampling scheme was implemented: in each location, samples were collected to 5 cm sediment depth and separated into two layers (0-1 and 1-5 cm). Each site (with one exception) was sampled under the crown of mangroves and 10 m apart on the bare sediments. In total, 187 putative species were identified; the alpha-diversity ranged from 16 to 56 with mean values about 30-32 species per sample in upper and low layers. Compared with other regions, the nematode community under the crowns of Rh. mucronata differed, whereas the nematodes composition in the vicinity of A. marina and on the bare sediments were similar. For Rhizophora samples the most common species were Parethmolaimus minor, Terschellingia ex gr. longicaudata and Syringolaimus sp.; dominant species on the bare sediments and under the аvicennia were Ptycholaimellus sp., Anoplostoma sp. and Sphaerolaimus sp. (Support: RFBR 20-54-56038).