Can the saltwater crocodile swim in the sea that shark swim?

Salt water crocs are designed to swim in the oceans and seas. This is irrespective of the fact that sharks are present or absent in the water. However, if you meant to ask if the crocs will be eaten by the sharks...................sharks can probably gobble up the baby crocs. But saltwater crocs are the largest crocs on the earth and no shark will try to harm a full grown one.