crocodile

The crocodile is not a fish, it is a vertebrate reptile, and it is the only descendant of the ancestors. It can swim in the water, login can climb, body fat, is called the "king of reptiles." It uses lungs to breathe. Because of its structure of amino acid chains in the body, it has a strong oxygen storage capacity and thus has longevity characteristics. The average life expectancy of crocodiles is up to 150 years old, which is the longest life in reptiles. According to archaeological findings, the crocodile has a body length of 12 meters and a weight of about 10 tons. However, most species of crocodiles have an average body length of about 6 meters and weigh about 1 ton. They mainly feed on fish, waterfowl, hare, frogs, etc., and are carnivorous animals.

The first grade of the fourth middle school: Fu Yulong