The exclamation point rasbora or least rasbora (Boraras urophthalmoides) is a species of ray-finned fish in the genus Boraras. It was first described from a freshwater swamp associated with the Sai Buri River in Pattani province, southern (peninsular) Thailand, but currently considered to range throughout much of southern and central parts of the country, with the province of Narathiwat on the border, with Peninsular Malaysia appearing to represent the southern limit of its range.