Let yourself be surprised by the Sea of Cortez as it is home to 35% of the world's marine mammals. You may encounter humpback, gray whales, blue whales, sperm whales, fin whales, pilot whales, Bryde’s whales, and Orcas, although the species that is seen regularly is the fascinating humpback whale. All of these whales roam the Sea of Cortez and the Pacific Ocean.