caption: The need to surface for air also results in skull shape adaptations. In many aquatic amniotes, the nares migrate towards the eyes, or the top of the head, so that the animal only has to lift a bit of its body above the water to breath. Easiest to see in whales and dolphins, like the beluga whale skull. In marine mammals, these dorsally positioned nostrils are called the blowhole. However, this is not the case for every aquatic animal. For instance, crocodiles' nares are on the tips of the snout. Anatomy Study, Crocodiles, Mammals, Aquatic Animal, Extinct, Whales, Dolphins, Surface, Skull
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