Santiago Island and the much smaller Bartolomé Island are in the northcentral waters of the Galápagos Islands just south of the equator by a few degrees. Often as your ship approaches the next destination, passengers are busy dressing, applying sunscreen and donning their lifejackets. Hopefully, you are on deck watching the sea. It is brimming with marine life. They are eager to put on a show. Common visitors riding the waves of a boat are pods of bottlenose dolphins. These beautiful grey mammals range from six to 13 feet long. Males can weigh over 1,000 pounds. Also swimming around the Galápagos are long-beaked and short-beaked common dolphins.