The outside of the abalone's body is covered with a thick calcareous shell. Its shell is a right-handed spiral shell. The single-walled shell of abalone is hard, right-handed in shape, and has a dark green-brown surface. The purple, green, white and other colors on the inside of the shell complement each other, making it look like jewels.
In addition, abalone shells have a series of spirally arranged protrusions that gradually increase from the top of the shell to the ventral surface. Some of these protrusions near the ends of the whorls are pierced with holes, and the number of holes varies with the species. There are 4-5 Panda abalone distributed in northern China, and 7-9 Variegated abalone distributed in the south. In ancient my country, abalone was named "nine-hole snail" because of its characteristics.