The circumstances, clinical features, complications and progress of eighty-one cases of stonefish stings are described. There were no fatalities, few complications and no lasting ill-effects. The various forms of treatment are discussed. The venomous fishes of Malaysia are briefly reviewed. It is concluded that stonefish stings occur fairly frequently in this country and that they are attended by appreciable morbidity, but that fatal cases or cases with lasting ill-health are probably rare.