Biofouling organisms—barnacles, tunicates, bryozoans, and other marine invertebrates—are a common sight on docks, ship hulls, rocks, and other hard underwater surfaces. WHOI postdoctoral scholar Kirstin Meyer has been studying the fouling community in coastal waters of Woods Hole, Mass., to assess how it develops and changes over time. Her preliminary results suggest that both water temperature and competition play a key role in driving community composition.