How to draw a shark is as follows:

1. First draw a two-line triangle as the upper fin of the shark, and draw two curved lines on both sides of the triangle. The first one on the left is shorter and the one on the right is slightly longer.

2. Draw a downward curve on the left side of the shark's head until it stops parallel to the upper fin. Next draw another two-line triangle pointing to the right, slightly smaller than the upper fin.

3. Draw a two-line triangle in the same position pointing to the left. Draw a curved line going up and to the right, but not connecting, leaving room for the tail.

4. The tail part is composed of two two-line triangles. Start drawing a larger two-line triangle at the top and stop at the bottom line. Draw another two-line triangle below to connect the tail, so the shark's body is complete.

5. Draw the shark’s face. On the lower left side of the shark's body, draw a two-line triangle pointing to the right. Then draw some zigzag lines inside for its teeth.

6. Draw a solid circle slightly above the shark's mouth as its eyes. Draw the shark's gills on the right side of the eye and draw three curved lines, so that a shark is drawn.

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, often calcified, but does not have any real bone tissue. The exoskeleton is not very developed or degenerated. The body is often covered with dermal teeth (scales). The teeth are diverse and have hard muscles, but the membranous bones are never Existence, seamless brain.