Urotrygon nana, the dwarf round ray, is a type of marine tropical ray found in fragmented localities across the south coasts of Central America.
Not much is known of its biology, except the fact that it is a benthic ray with a venomous spine on its tail. This species can reach a maximum total length of 32 cm, even though the common length is just around 15 cm.
This stingray is found in the south coasts of Mexico, Guatemala, El Salvador, Honduras, Nicaragua, Costa Rica, and Panama. It inhabits very shallow inshore waters at depths of 2-15 m.