The smallspine turretfish (Tetrosomus reipublicae) is a species of marine ray-finned fish belonging to the family Ostraciidae, the boxfishes.

The smallspine turretfisj was first formally described as Triorus reipublicae in 1930 by the Australian ichthyologist Gilbert Percy Whitley with its type locality given as Moreton Bay in Queensland.

[3][4] The 5th edition of Fishes of the World classifies the genus Tetrosomus within the family Ostraciidae in the suborder Ostracioidea within the order Tetraodontiformes.

[1] The smallspine turretfish occurs in the tropical, Indo-west Pacific, ranging from East Africa through Indonesia north to southern Japan and south to Australia.

In Australia it ranges from Albany to northeast of the Monte Bello Islands, Western Australia and north Queensland as far south as Tathra, New South Wales, as well as in the Lord Howe Province in the Tasman Sea.