Eight-oared shells are a type of rowing boat designed for competitive racing. They are typically long and narrow, allowing for speed and efficiency on the water. Each shell is propelled by eight rowers, with one person acting as the coxswain, who steers the boat and coordinates the crew's movements. These shells are commonly used in the sport of crew or rowing, where teams compete in various distances. The design of eight-oared shells emphasizes balance and teamwork, as all rowers must synchronize their strokes to achieve optimal performance.