Meiacanthus smithi, the disco blenny, is a species of combtooth blenny found in coral reefs in the western Pacific and Indian oceans. This species grows to a length of 8.5 centimetres (3.3 in) TL. It is also commonly known as Smith's fangblenny, Smith's sawtail blenny or Smith's harp-tail blenny. This species is also found in the aquarium trade.