May 31, 2019; KELOWNA - British Columbia's Invasive Mussel Defence Program is launching into its fifth season of protecting B.C. waterways from invasive zebra and quagga mussels. From now until late October 2019, inspectors with the B.C. Conservation Officer Service (COS) will be at 12 inspection stations throughout the province, educating the public about invasive mussels and checking boats travelling into and through B.C. before they enter the water.