Crocodiles are large aquatic reptiles that live throughout the tropic of africa.Its subfamilies are Cuvier, Crocodylinae.Its species all classified into 14 extant species are recognized .It is said to be a sucessfull predator and they also have webbed feet which though not used to propel them through the water.There are mainly two types of crocodile salt water crocodile,osteolaenmus .crocodiles are similar to alligators and caimans for their common biology and difference bewteen them.