During the first dive of the Deep-Sea Symphony expedition, we explored a dense community of deep-sea corals and sponges on a site dubbed "Tropic of Cancer" seamount, at a depth of ~1,900 meters (6,230 feet). Along with a diversity of octocorals, hexacorals, and glass sponges, scientists encountered some particularly large colonies of bamboo corals and chrysogorgid corals. The dive site was selected based on a model by the NOAA National Centers for Coastal Ocean Science (NCCOS), which predicted that this seamount would be host to a diversity of coral species.