Acknowledgements
This work was funded by Fisheries and Oceans Canada’s Program for Aquaculture Regulatory Research, granted to Cathryn Abbott and Terri Sutherland (#PARR-2016-P-06). We thank Nathan Blasco, Kerra Shaw, and Adrienne Paylor from DFO’s Aquaculture Management Division in Campbell River, as well as Geoff Lowe, Kara Aschenbrenner, and Guang Kun Zhang for their support and help with sample collection. We thank Kara Aschenbrenner, Louise-Marie Roux, Aaron Schuler, and Angela Schulze for their assistance in the laboratory. We are also grateful to Leslie Harris for taxonomic identification of polychaete specimens she provided via iNaturalist (www.inaturalist.org).