Pseudorhombus arsius ( Hamilton, 1822 )

Pseudorhombus arsius ( Hamilton, 1822) View in CoL

Figure-1, Table-1–2

Materials examined: ZSI/ EBRC / F17548 (1: 151 mm TL), Rupnarayan River, West Bengal, 22.425867 N, 87.913028 E, coll. by Dipanjan Ray , 22 Nov. 2024 GoogleMaps ; ZSI/ EBRC / F17549 (1: 267 mm TL), Chandanipal fish landing centre, Odisha, 20.790 N, 86.96203 E, coll. by Anil Mohapatra and Party, 24 Nov. 2023 GoogleMaps ; ZSI/ EBRC / F17550 View Materials (1: 283 mm TL), Chandanipal fish landing centre, Odisha, 20.790 N, 86.96203 E, coll. by Anil Mohapatra and Party, 24 Nov. 2023 GoogleMaps ; ZSI/ EBRC / F17655 (3: 192–285 mm TL), Chandanipal fish landing centre, Odisha, 20.790 N, 86.96203 E, coll. by Anil Mohapatra and Party, 24 Nov. 2023 GoogleMaps .

Diagnosis: The species can be diagnosed by having lateral line on both sides, with ctenoid scales on the eyed side and cycloid scales on the blind side. The eyed side has two eye-like dark spots on the lateral line. Numerous greenish-white cloudy spots are visible in live. The teeth on the lower jaw are 10–12. On blind side if the straight part of the lateral line extended forward, it passes well above upper eye. Total vertebrae: 34–35. The details of body ratio and morpho-meristic counts are given in ( Table 1–2).

Colour: The whole body is creamy brown in colour. The blind side of the body is white in colour. There are two dark, eye-like black spots on the eyed side lateral line. One is just at the junction of curved and straight part of LL, and the other one is just at the one-third portion of the body on the upper edge of lateral line. There are numerous cloudy spots on the eyed side, which colour varies from light green to dark whitish. This colouration changes after 2 to 3 hours of death or preservation. A few black small melanophores are visible in whole body and as well as in dorsal, anal, caudal and pectoral fins.

Distribution: The species is distributed in India and Bangladesh. All other reports need to be reverified for species confirmation.