The document summarizes Greenburg's experiences swimming with dolphins in two locations. In Florida, Greenburg and his family swim with dolphins in an enclosure, but the dolphins seem more interested in the photographer's colorful suit than the humans. In Hawaii, Greenburg is able to successfully communicate and interact with a dolphin named Ellie through signs and commands, demonstrating the animal's intelligence. Greenburg leaves feeling satisfied by his positive experience with Ellie in Hawaii.