On September 1, 2021 NCCOS, the U.S. Integrated Ocean Observing System (IOOSⓇ) Office, and the IOOS Association organized the inaugural meeting of a newly formed Harmful Algal Bloom Observing Group (HAB-OG). The HAB-OG is a next step in implementing and sustaining the National Harmful Algal Bloom Observing Network (NHABON).