The oceans of the earth are vast and, in large part, unexplored. Under the waves, there are many fascinating and mind-boggling sights to be seen. Oceans, seas and more generally waterways around the world allow sailors and curious to observe extraordinary phenomena. The ocean phenomenon occurs when there is rapid growth or blooming of algae in the oceanic waters. Tsunamis are destructive forces that wield tremendous power, while smaller, regular waves are some of the most beautiful sights on Earth.