Euastacus bidawalus, the East Gippsland spiny crayfish, is an Australian freshwater crayfish endemic to the East Gippsland area of Victoria and the far south coast of New South Wales.

[2] E. bidawalus is green-brown or red-brown on the back, paler on the sides to cream and orange on the belly.

[2] The East Gippsland spiny crayfish has been recorded at elevations of 150–400 m (490–1,310 ft) from south and east flowing rivers from Lind National Park, about 20 km west of Cann River, to near Mount Imlay south of Eden.

[5][2] Breeding starts around May to June with the eggs being carried by the female until about December or January.

[5] Listed as endangered by Coughran & Furse,[1] the East Gippsland crayfish is relatively common within the suitable although patchy areas in its range.