Beddomeia capensis is an aquatic operculate gastropod mollusk, a species of very small freshwater snail that has a gill and an operculum, in the family Hydrobiidae.

The species is classified as endangered and known to be endemic to five streams within a relatively small area on the island state of Tasmania, Australia.

[1][2][3] B. capensis are small (1–7 mm) and difficult to identify to a species level in the field, being distinguished by a number of shell and anatomical characters.

[2][3] B. capensis is known from two small streams on Table Cape, where they are located on and under stones, leaves and wood where it feeds actively, grazing on periphyton.

As the species is confined to small order streams, it is consequently at a higher risk of being impacted by habitat degradation and modification due to agricultural land practises.