Stone turtles belong to the primitive type of shellfish in the class Polyplacophora, which are rock-colored and shaped somewhat like terrestrial tide worms. Usually ovoid, flattened and symmetrical on both sides. The shell consists of eight plates arranged in a tiled pattern. The shell is surrounded by a ring of coat membrane, also known as the ring band. The foot is flat and wide, several accounted for the entire body of the ventral surface, suitable for adsorption on the surface of the rock or creeping and crawling. It is one of the important components of marine plankton.

There are many species of rock turtles, which are distributed in the sea all over the world. Usually live in the normal salinity of the sea water on the rocky shores or the bottom of the ocean with high salinity, in the estuaries with freshwater inflow is rare, in addition to many species living on shallow rocks, there are a few species living in the deep sea, some species attached to the seaweeds or **** the body of the other animals live. The color of their bodies is similar to the color of the objects or organisms they are attached to, and is a good protective color.

Real or fake abalone

Since dried abalone sells for a lot of money on the market, some unscrupulous traders use the worthless "dried stone turtle" to sell it as "dried abalone" to make a huge profit.

Abalone such as other shellfish, there is a hard shell, but the shell of abalone shell is very small, the shell mouth is very large, there is a small hole around the edge (commonly known as the "nine holes snail" for the sake of). Its foot is very developed, and the bottom of the foot is flat. Dried abalone sold in the market has been removed from the shell, the shape is slightly like a boat, there is a very smooth side, that is, the abalone's plantar part. The "stone turtle" also has a developed foot, the soles are also flat, so a little processing can be used to pretend to be abalone, but as long as a careful discernment will find that the "stone turtle" due to the thin flesh, drying will be shrinking and bending, and the edges of its feet are very rough.