 Examples include albatross, penguins, gannets, and auks.Although they spend most of their lives in the ocean, species such as gulls can often be found thousands of miles inland.There are five main types of marine mammals, namely cetaceans (toothed whales and baleen whales); sirenians such as manatees; pinnipeds including seals and the walrus; sea otters; and the 
polar bear.