Hypselodoris saintvincentia is a species of colourful sea slug or dorid nudibranch, a marine gastropod mollusk in the family Chromodorididae.
This species was described from the intertidal zone at Coobowie, west coast of St Vincent Gulf, South Australia 35°02′39″S 137°44′24″E / 35.044260°S 137.739888°E / -35.044260; 137.739888. It is related to the widespread tropical species Hypselodoris infucata and the similar Australian species Hypselodoris obscura. It has been reported from depths to 12 m and from Western Australia.
