I took this picture from the bow of the boat we used to do our swimming with the dolphins adventure. Incredible experience. We swam with approximately 500 dolphins. The Dusky dolphins are from 4-6 feet long and are curious about swimmers. We sang through our snorkels, which caught the attention of the dolphins. They would swim around us as individuals or sometimes 2-4 at a time. They would dart in and out. Amazing experience.