Creatonotos gangis is a species of arctiine moth in South East Asia and Australia.

Adult males secrete the pheromone hydroxydanaidal in order to attract mates. The amount produced, and the size of the coremata which produce it, are however dependent on the diet that the moth experienced as a caterpillar. If the larval diet contained pyrrolizidine alkaloids, then the coremata become large and the male will release up to 400 micrograms (0.4 milligrams) of Hydroxydanaidal, but if it does not, then the coremata do not grow large and no scent is produced.