An eerie song bubbles from the depths, not quite describable, but you can feel it, a shadow emerges into sunlit waters, growing larger as it approaches.
Suddenly like a volcano erupting, a huge body covered in barnacles, erupts on the surface in a balletic roll, gasping for air and spewing water.
Several others join the first, the majestic spectacle of nature, the largest creatures on the planet, move off in a group, just below the surface.