Glossogobius flavipinnis is a species of goby endemic to Lake Towuti in Sulawesi, Indonesia, where it is generally found at shallow depths over hard bottoms. This species can reach a length of 8 centimetres (3.1 in) TL, although in a review of museum specimens the largest male was only 3.9 centimetres (1.5 in) and the largest female 5.7 centimetres (2.2 in). It is overall uniform dark with a yellow first dorsal fin. It was previously known under the name Stupidogobius flavipinnis.