Our voyage among great whales commenced today with an exploration of the southernmost section of the Magdalena Bay Complex called Bahia Almejas (Clams Bay). National Geographic Sea Bird anchored close to Cresciente Island (Crescent Island) which marks the southern limit of Bahia Almejas. Half of our guests and naturalists got on pangas, multi-purpose fiberglass boats, with local permit holders for the first whale watching activities. We spotted whales breaching, spy-hopping, and performing other types of behavior. The other half of our guests went to explore the shores and arroyos of Margarita Island where they discovered many interesting things. Then the groups switched. It was our first foray into the Sonoran Desert environment, and we captured excellent pictures that spoke of some of those wonders. In the afternoon, our cetacean specialist delighted us with a slideshow on gray whales.