During Dive 01 of the 2019 Southeastern U.S. Deep-sea Exploration, we explored the Stetson-Miami Terrace Deep Water Coral Habitat Area of Particular Concern (HAPC). The largest coral HAPC in the continental United States, it has protected sensitive deep-sea coral and sponge habitat since 2010. This habitat supports a diverse array of invertebrates and fishes, some of which are commercially important. Though vital ecosystems, deep-sea coral habitats are not as well understood as their shallow water counterparts. Increased understanding is key to the sustainable management and protection of these habitats, but first we need to know that they are there. Deep-sea exploration is the first step toward increasing our understanding of these wonderful and diverse habitats.