Oahu has many popular beaches for snorkeling. These spots are easily-accessible and great for families. One good spot is Hanauma Bay. It has a beautiful underwater world. Many tropical fish and sea turtles swim here. The water is warm and clear. This makes it easy to see the vibrant sea-life. Another great place is Electric Beach. The nearby power plant keeps the water warm. This attracts many aquatic denizens, including dolphins.