Draw an ellipse on the paper first, and the sides can be wider.

On both sides are the crab's two big pliers.

Then draw the crab's eyes. The eye is between two pliers, the first is the antenna between the eye and the shell.

Just draw two concentric circles on your eyes.

Then the crab's little feet, leaving six, two left and right, and two below.

Finally, draw a stripe on the back of the crab.

The simple way to draw a crab is to draw an ellipse first, then draw lovely big eyes, feet and pliers, then paint its hard shell red and brown, and finally paint the eyes and other places well, so that the crab is drawn.