Dagon is worshiped primarily by boggards, heretical sahuagin and skum, marsh giants, and desperate or insane coastal dwellers. Most of his worshipers are grotesquely deformed or engage in various abhorrent practices of interbreeding with strange ichthyic or aquatic creatures that dwell nearby. His holy places are often decaying seaside churches, lighthouses, sea caves, or darkly beautiful underwater cathedrals. Often his worshipers also venerate various Great Old Ones, in particular Cthulhu, and it's not unusual to find priests of Dagon and Cthulhu working side by side in a community.