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        Anatomical Advantages of the Spinosaurus

        Explore the physical characteristics of Spinosaurus in this video from NOVA: Bigger Than T. rex. Comparing the anatomy of Spinosaurus fossils to living animals (such as birds and crocodilians) reveals many features that support the theory that it hunted fish: flat feet to help maintain stability in wet sediment and to act like paddles; smooth cone-shaped teeth and a narrow skull adapted for catching fish; a sensitive snout for detecting motion; and a tail to help propel it through water. Scientists do not know the purpose of the large sail on the back of Spinosaurus but it may have been used as a display to ward off predators or attract mates.

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