New distributional record of the Indo-Pacific tropical sand goby, Favonigobius reichei (Actinopterygii, Gobiiformes, Gobiidae), from Jeju-do Island, Korea

Two specimens, a male–female pair of Favonigobius reichei (Bleeker, 1854) (32.7–41.9 mm SL) were collected from the intertidal zone based on sandy and muddy areas in Jeju-do Island, Korea. This species is distinguished from Favonigobius gymnauchen (Bleeker, 1860), the previously recognized sole representative of the genus Favonigobius in Korea, by the following characteristics: VI–I, 8 dorsal fin rays, I, 8 anal fin rays, predorsal scales 0–1, and the black spot at the base of the caudal fin undivided and rounded. We propose a new Korean common name, “Hwang-jul-nal-gae-mang-duk” for F. reichei based on the yellow stripes on the abdomen of the male.