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Rhinogobius lentiginis is a small goby that appears endemic to Zhejiang province, eastern China, growing to around 32 mm SL. Given its natural range and the lack of commercial collecting there, it is unlikely to have been in the aquarium hobby. Irregular dark blotches and spots on the cheek and opercle separate it from its most similar congener, R. davidi, which has a single dark vertical stripe there.