About the color of pure crocodile turtle.

Crocodile turtles are native to North America and Central America, and are also called little snapping turtles. In recent years, they have been successfully introduced into China for artificial propagation. They are famous for their strong and fleshy bodies, so they are also called meat turtles. They are rare among soft-shelled turtles, and have the characteristics of high meat yield, rich nutrition, fast growth and high economic value. Its meat yield ranks first among turtles, reaching 85% ~ 89%, which is twice that of ordinary turtles. The average annual weight gain of snapping turtles is 550 g ~ 1 100 g, which is several times that of ordinary turtles. The meat of snapping turtle is delicate, crispy and delicious, without peculiar smell, and the nourishing effect is very obvious. It can dredge meridians, help yang meridians, replenish yin and blood, and replenish essence. It has obvious curative effect on deficiency of essence and blood, mental fatigue, chronic paralysis and weakness, and cough, especially suitable for postpartum tonic, anemia, insomnia and mental decline. Tortoise shell has detumescence effect and is suitable for yin deficiency and blood deficiency caused by cancer. Turtle blood and glans penis also have certain medicinal value.

Crocodile turtles belong to Chordata, Vertebrate, Reptilia, Tortoise, Tortoise and Tortoise.

It's called tortoise. Two kinds of edible freshwater turtles in Tortoise are named after their biting methods. Found in North and Central America, it is famous for its huge size and aggressiveness. Brown-yellow to black, rough carapace, small cross carapace, long tail, big head and hooked lower palate. Twenty eggs at a time? 6? 540 yuan. The newly hatched turtle shell is about 2.5 long? 6? 54 cm ( 1？ 6? 5 1.5 inch), the meat is edible. The common snapping turtle (Chelydra serpentina) is widely distributed from Canada to Central America. It is characterized by serrated ridges on the back of its tail, and the average length of its carapace is 20? 6? 530 cm (8？ 6? 5 12 inch), weighing 4.5? 6? 5 16 kg (10? 6? 535 kg). There are three longitudinal ridges on the carapace of young turtles, which gradually wear out with time. Hiding in the mudflats of shallow streams. Omnivores are usually not easy to fight in water, but they can run and bite on land. Macrochelys temmincki is the largest freshwater fish in the United States, which is found in the southern and central parts of the United States. Not easy to move, with three raised longitudinal ridges on the back. A length of about 40? 6? 570 cm ( 16？ 6? 528 inches) weighs about 18? 6? 570 kg (40? 6? 5 155 lb), there was a record of about 100 kg (200 lb). There is a worm-like appendage at the bottom of the mouth, which often lies in the water and opens the mouth of the mouth, attracting nearby fish by the appendage. They also eat plants. Fossils of snapping turtles were found in Miocene sediments in Europe and North America.

Crocodile turtle looks like a crocodile, which is a combination of turtle and crocodile, so it is called crocodile turtle. Its head is very thick, it can't be completely retracted into the human shell, its neck is short and thick, its collar and back are covered with brown thorns, its eyes are small, its mouth and jaw are small, its nose and mouth are sharp, its tail is sharp and long, and its edges are covered with fleshy thorns. It has a scale ridge with serrated mouth in the front two-thirds of its tail, a thin dorsal shell, brown epithelium and three stripes on its back.

The difference between the big snapping turtle and the small snapping turtle is mainly manifested in six aspects:

1. Head, the crocodile's head is sharp, and the little snapping turtle's head is round. The upper jaw of the big snapping turtle looks like an eagle beak with a big hook, while the upper jaw of the small snapping turtle looks like a hook, but the hook is very small. The big snapping turtle can suddenly attack other animals, and the small snapping turtle can use its body to turn around to find the target, and even chase after it.

2. Mouth: The mouth of a big snapping turtle is longer than that of a small snapping turtle, and its tongue is red. There is a worm-like appendage at the bottom of the mouth, which often lies in the water with its mouth open, attracting nearby fish with the help of the appendage. Little snapping turtles don't have these characteristics.

3. The carapace, the carapace peak of the big snapping turtle is obvious, but the carapace peak of the small snapping turtle is not obvious, almost flat, and the carapace looks round. There are three longitudinal ridges on the carapace of the crocodile turtle, which are brown, and each shield has a protrusion. The carapace is brown and has an upper shield. The carapace of the small snapping turtle is brown or dark brown, with three longitudinal ridges, slightly raised ribs and shields, and the ridges gradually wear out with time.

4. Abdomen, there are countless tentacles in the abdomen of the big snapping turtle, and there are only a few tentacles in the abdomen of the small snapping turtle. The abdominal armor is gray, and there is no shield.

5. Tail: The big snapping turtle has a long tail, while the small snapping turtle has a short tail, and there is a zigzag ridge on the back of the tail, also called the tail spine.

6. Growth speed: Crocodile turtles grow slowly when they are young, and grow faster when they reach 250g g. Under the condition of artificial temperature control, it only takes 1 year to grow from 250g to 2500g, and the largest individual in nature reaches more than 100kg. Small snapping turtles grow slowly below 50g, and it takes about 80 days to grow from 7g to 50g. Under the condition of temperature control, it takes only 1 year for a 50-gram snapping turtle to grow to 2500 grams or a 7-gram snapping turtle to grow to 1.500 grams. In the natural state, small snapping turtles can grow to more than 23 kilograms. The difference in growth speed between the big snapping turtle and the small snapping turtle is mainly caused by different habits. The snapping turtle is lazy and not good at taking the initiative to eat. It lures small fish with its earthworm-like "tongue". Small snapping turtles can take the initiative to eat, and naturally grow faster than big snapping turtles. Therefore, China breeds more small snapping turtles than big snapping turtles.