In September 1993 there was a brief investigation of a mosquito problem at the Paspaley Pearl base at Raffles bay on Coburg Peninsula. Mosquito traps were set by Mr Geoff Wessels on the 10th of September 1993 and the results and conclusions from these traps were reported in a short paper by the Medical Entomology Branch of the Department of Health and Community Services. The trapping indicated there was a particular problem with salt marsh mosquitoes (Aedes vigilax).