Prevention

Wear gumboots when entering the river.

Treatment
For immediate relief of pain associated with the sting of a bullrout, immerse the affected area in hot water.

What is a bullrout?

The bullrout (Gumbayngirr - guularr, dawaarr), commonly called freshwater stonefish or kroki, is a pale yellowish to dark-brown coloured fish, whose spines are venomous. (Wikipedia, 2021)