Pseudorhombus, Bleeker, 1862, belongs to the family Paralichthyidae in Pleuronectiforms. According to Eschmeyer's Catalog of Fishes, there are 25 valid species recorded, and 11 species recorded from the coastal waters of mainland China based on the Fauna Sinica, Osteichthyes, Pleuronectiformes by Li and Wang, 1995. Nine specimens with five ocelli on the ocular side were collected from 2007 to 2021 along the coastal waters of Wenchang, Lingshui and Sanyan in Hainan province, and then, compared with the morphological characteristics of 25 species in Pseudorhombus. The results showed that these specimens were consistent with the morphological characteristics of Pseudorhombus oculocirris Amaoka, 1969, which has only been reported in Japan and Vietnam. This is the first report of this species from the coastal waters of mainland China. A detailed redescription of P. oculocirris was given based on the data of morphological characters of nine specimens collected in this study and previous works, including the original description and related literature of this species. Furthermore, the COI barcoding was provided for the first time (GenBank No. OL307681, OL307682 and OL307683). The diagnosis characteristics for this species are as follows: The anterior dorsal fin rays are slightly longer and only 1/5–1/3 of its base is connected with the fin membrane; the upper edge of the lower eye has finger–like dermal tentacle. Dorsal fin rays 65–76; Anal fin rays 50–57; Pectoral fin rays 11–13 on ocular side, 10–12 on blind side; Caudal fin rays 2 + 13 + 2; gill–rakers on first arch 4–7 + 17–20; lateral line scales 71–82; vertebrae 10 + 26 = 36. In summary, the present study further expands the distribution of this species and provides the molecular basis for species identification, which can serve as the scientific evidence for the study of the biodiversity and systematic evolution of Paralichthyidae.