Canada has the world’s longest coastline, yet until recently its coastal ecosystems have been largely overlooked in national carbon accounting and nature-based climate solution frameworks. Recent syntheses have identified Canadian blue carbon as a major research gap in the literature. The extent, stocks, sequestration rates, and fluxes of salt marshes, flats, and seagrass meadows remain poorly constrained across the Atlantic, Pacific, and Arctic coasts. In response, the Canadian blue carbon community has grown rapidly over the past several years. That growth has come from new national networks, government, NGO, and industrial partnerships, restoration programs, and an influx of early-career researchers. This session aims to share recent advances, compare methods, and more generally bring together coastal researchers in the CGU. We particularly welcome work linking process understanding to inventory, policy, and carbon market applications, as well as Indigenous-led and community-partnered research.