No, the crocodile is a vertebrate amphibious reptiles, most of its temperament fierce and violent, like to eat fish and frogs and other small animals, and even devouring livestock. According to records, the world's existing crocodile **** more than 20 species, China's Yangzi crocodile, Thailand's Gulf crocodile and logic crocodile are more famous species. China's largest crocodile breeding base is the Guangzhou Panyu Farm, which covers an area of nearly 70 hectares and has nearly 100,000 crocodiles such as the Gulf crocodile, loggerhead crocodile, Chinese alligator, South American alligator and other crocodiles. In addition to a few crocodiles living in temperate regions, most of them live in tropical subtropical regions of rivers, lakes and watery swamps, and some of them live in the shallows near the coast. It has a long face, long mouth, the so-called "king of the world, such as crocodiles" said. Crocodiles are rich in ornamental value. Crocodiles also have a variety of medicinal health effects. The crocodile is also a valuable edible delicacy. Because of its whole body treasure, therefore, some countries in the world actively develop crocodile breeding industry. Crocodile is a species of Crocodile family of the order Crocodyliformes. Also known as the bay crocodile or sea crocodile. Distributed in coastal Southeast Asia until the north of Australia. The total length of 6 to 7 meters, the longest up to 10 meters, is the largest existing reptile. Bay crocodiles live in the bay or far across the sea. Nesting in the freshwater riverside shade hills (more than 60,000 meters from the sea) they use their tails to sweep out a 7 to 8 meters platform, the platform built on the true diameter of 3 meters to put the crocodile eggs of the nest, the nest from the river is about 4 meters to the shade of the leaves of the composition, each nest has a white hard-shelled eggs of 50 or so, the size of about 80 × 55 millimeters; female crocodiles waiting in the nest side, when fluttering tail sprinkling water wet nest, to maintain the 30-33 ℃ temperature, 75-90 days incubation; hatchlings out of the nest. days incubation; chick crocodile out of the shell 240 mm long, 1 year can grow to 480 mm, 3 years up to 1156 mm, weighing 5.2 kg. Crocodiles are fierce and untamed. Adult crocodiles are often underwater, with only their eyes and nose exposed to the surface. They have sensitive ears and eyes, and immediately sink when frightened. Afternoon more floating sunshine, night eyes bright. Young crocodiles have a reddish color. Crocodile mating in May to June, continuous hours, and fertilization only 1 to 2 minutes; July to August spawning. Male crocodiles monopolize the field, drive to fight intruders, a male rate of support groups of females. Often eat fish, frogs, shrimp, crabs, but also eat small crocodiles, turtles, soft-shelled turtles. Chewing power, can break the hard armor. China's Han Dynasty began to know the south of the crocodile, the Tang and Song dynasties have records, since the Ming and Qing Dynasties occasionally seen on coastal islands. As the saying goes, "crocodile tears" is really true. Crocodiles really will shed tears, but that is not because it is sad, but it is in the excretion of excess salt in the body. Crocodile kidney excretion function is very imperfect, excess salt in the body, to rely on a special salt gland to excrete. The salt glands of crocodiles are located near the eyes. In addition to crocodiles, sea turtles, sea snakes, sea lizards and some sea birds have similar salt glands. Salt glands enable these animals to remove excess salt from seawater so that they can get fresh water. So the salt glands are their natural "desalinator".