How to draw a shark picture is introduced as follows:
1. First draw the shark’s head and mouth, and then draw the teeth on the shark’s mouth.
2. Then draw one of the shark’s eyes on the shark’s head.
3. Draw the shark’s abdomen below, and then draw the shark’s pelvic fins on the abdomen.
4. Draw the back of the shark on top of the shark, and then draw the dorsal fin of the shark.
5. Then draw the back body and tail of the shark.
6. Draw the texture line on the tail of the shark, and then draw the pattern of the shark on the body.
7. Finally, we draw the lateral line on the shark's body, so that the simple shark is finished.
Sharks live in the ocean and are the most ferocious fish in the ocean. Sharks have been on Earth 300 million years before the dinosaurs and have been around for more than 500 million years. They have changed little in the past 100 million years. Sharks, known as sharks, sharks, and sharks in ancient times, are behemoths in the ocean, so they are known as "wolves of the sea." There are also whale sharks and great white sharks.
Sharks belong to the vertebrate phylum Cartilage, subclass Elasmobranchia, and live in the sea. A few species enter freshwater. They are a group of medium and large marine fish that swim fast.
The endoskeleton of sharks is entirely composed of cartilage, which is often calcified, but does not have any real bone tissue. The exoskeleton is not very developed or degenerated. The body is often covered with skin teeth (scales). The teeth are diverse and have hard muscles. , but the membranous bones will never exist, and the brain and skull are seamless. The upper forehead is composed of the quadratopalatine cartilage, and the lower forehead is composed of Mayer's cartilage.
Appearance characteristics:
The body is long and spindle-shaped. The gill slit is in lateral position, the pectoral fin is normal and does not heal with the front edge of the snout; the northern fin is in dorsal position; the tail is crooked.
The body is spindle-shaped, with gill slits on both sides of the head, but it looks like an ordinary fish. With a few exceptions, a typical shark's skin is hard and dark gray in color, with tooth-like scales giving the skin a rough appearance. The tail is strong, asymmetrical and upturned; the fins are pointed; the snout is pointed and protruding, with a crescent-shaped mouth and triangular fangs under the snout. Sharks have no swim bladder and need to swim continuously to avoid sinking to the bottom. ?
Body size:
The total length of 80 species of sharks is less than 1.6m, and the vast majority of sharks are small fish. The largest among the sharks is the whale shark, also known as the whale shark, which is 20m long and weighs 7000-8000kg. It is the king of fish. The smallest is the broad-tailed dogfish (also called the small sperm shark). The mature male fish is 15cm and the female fish is 20cm. , the body size difference between big and small sharks is more than 100 times.
A giant shark, a fossil species from the Tertiary Period, has been discovered. Its teeth are 15.24cm long and its body length is estimated to be up to 90m. This two-jaw model is on display at the American Museum of Natural History, which can accommodate 6 people standing on it. In the mouth.