The Symposium is the main event for the Deep-Sea Biology Society, and takes place every three years. It brings together leaders from the fields of research, exploration, marine operations, conservation, and management for the deep ocean environment, including benthic, vents and seeps, and water-column biology and oceanography. Returning to the United States for the first time since 2003, the 15th Deep-Sea Biology Symposium will be held September 9-14, 2018 in Monterey, California. This 5-day conference will feature plenary speakers and two daily concurrent sessions. There will be an opening reception, a poster session on Tuesday night, and a concluding symposium dinner on Friday night at the world renowned Monterey Bay Aquarium. Abstract submissions due March 30, 2018.