Crocodile is a carnivorous ovoid vertebrate reptile. It is the oldest reptile contemporaneous with dinosaurs more than 200 million years ago. It is also one of the most primitive animals that have survived so far.

Crocodiles survive and multiply because of their strong vitality, and have become one of the oldest "living fossils" on the earth. Crocodiles are endangered wild animals and are listed as endangered wild animals and plants under class I protection internationally.