Gondwanothrix halsei is a species of small crustaceans (ca. 1.0–1.3 millimetres or 0.039–0.051 inches) within the order Cladocera, in the suborder Anomopoda, placed in its own family, Gondwanotrichidae. It exists in a macrotrichid habitus found in humic coastal dune lakes and swamps in southwest Western Australia. The species' type locality is Angove Lake in the Two Peoples Bay Nature Reserve (34°56′32″S 118°9′54″E / 34.94222°S 118.16500°E).