a) Alligatoridae
- The caimans (Caiman, Palaeosuchus, Melanosuchus)
- The alligators ( Alligator)
b) Crocodylidae
- True crocodiles (crocodylus)
- Dwarf crocodiles (osteolaemus)
c) Garialidae
- Gharial Garialis
- False gharial Tomistoma.
These reptiles which are amphibious and carnivorous lives in a habitat of tropical and subtropical lakes, rivers and coasts. Crocodilians are referred as