although "deinosuchus" was far larger than any modern crocodile or alligator, with the largest adults measuring in total length, its overall appearance was fairly similar to its smaller relatives. it had large, robust teeth built for crushing, and its back was covered with thick hemispherical osteoderms. one study indicated "deinosuchus" may have lived for up to 50 years, growing at a rate similar to that of modern crocodilians, but maintaining this growth over a much longer time.