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About Sarcosuchus:
Dubbed "SuperCroc" by the media, Sarcosuchus looked and behaved like a modern crocodile, but it was much, much bigger--about the length of a city bus and the weight of a small whale (or about twice as long and 10 times as heavy as the largest crocodiles living today). Like modern crocs, it's believed that Sarcosuchus lay half-submerged in rivers and streams, tilting its eyes upward to catch sight of prey. (See a gallery of Sarcosuchus pictures.)
Aside from its enormous length and girth, the most notable feature of Sarcosuchus was the strange, bulging protuberance on the end of its snout, called a "bulla." This Jimmy Durante-like schnozz may have enabled the SuperCroc to communicate (via grunts, squeaks, and other vocalizations), it may have enhanced its sense of smell, or it may simply have been a sexually selected characteristic (meaning a Sarcosuchus with an especially big bulla was more likely to mate and have SuperCroc kids).
