No, the size difference is too big. An adult giant crocodile has no natural enemies.

Crocodile is a higher reptile. It breathes with lungs. Its heart is divided into four chambers. There is a bony palate on the roof of its mouth, which separates the nasal cavity from the mouth. Its teeth are only grown in the alveoli of the upper and lower jaws. These are similar to mammals, which shows that mammals evolved from reptiles.