Marine invasive species have received much less attention than terrestrial species worldwide. In the Pacific, the marine environment provides us with a significant part of our diet and income. Marine Managed Areas focus on protecting these important resources for livelihood purposes, biodiversity and ecosystem function, tourism and many other benefits. Although invasive species management is more difficult in the marine environment, it is not something we can neglect, and the efforts we put in need to increase. This guide seeks to provide some options for this management. Special thanks to Anne Haas, who completed an internship with the SPREP Invasive Species Programme from Yale University in 2015, for completing the literature review and creating the text for this guide.