[2] It is a freshwater fish native to Australia, where it ranges from the Barwon River basin near Barwon Downs in Victoria west to the Watervalley Wetlands near Coorong National Park in South Australia.

The environments in which the species occurs are usually characterized by still or slow-flowing water and partial shade, and they may occasionally be slightly saline.

[3] Water quality measurements indicate that Galaxiella toourtkoourt is tolerant of a wide range of water conditions, with individuals inhabiting areas with a temperature between 5.2 and 26.9 °C (41.4 and 80.4 °F), a dissolved oxygen level of 20% to 263% saturation, a pH of 5.3 to 9.3, a conductivity of 94 to 13,620 μS/cm, and a turbidity of 1 to 96 NTU.

It is often seen alongside other native fish species such as Nannoperca australis and Galaxias maculatus, crayfish belonging to the genera Engaeus and Geocharax, and the introduced eastern mosquitofish.

Galaxiella toourtkoourt is a small fish, reaching 4.2 cm (1.7 in) in total length.