Are there any pearls in the clam?

Clam is a family of molluscs collectively referred to as clam shells, crooked in some places, living in freshwater lakes, ponds, rivers and other underwater, semi-buried in the sand, its meat is edible, can also be used as bait for fish, poultry and poultry, livestock feed, some areas for freshwater beads, let's take a look inside the clam whether there are pearls!

Are there any pearls in the clam?

There are pearls in the clam, but not every clam has pearls, and it is not easy to grow pearls in wild clams. The formation of pearls requires external worms or sand particles to enter the clam body. After a long time, the clam secretes pearls and wraps the worms or sand grains for many years before they can form pearls. Natural pearls are generally the best. Cultured pearls are cheaper.

How do pearls come into being?

1. External cause: the mantle of the clam is stimulated by the invasion of foreign bodies (sand grains, parasites). The epidermal cells in the stimulated place take the foreign body as the core, the pearl sac cells secrete pearl, and the nucleus is wrapped into pearls layer by layer. Such pearls are called "nucleated pearls".

2. Internal cause: after the outer mantle epidermis of the clam was stimulated by pathology, part of the outer epidermis of the clam was separated after cell division, coated with the organic matter secreted by itself, and gradually fell into the connective tissue of the mantle, forming pearls, which were called "seedless pearls".

What kinds of mussels do you have?

1. Pleated crown clam: it is also known as chicken crown clam, lake clam, cotton clam, etc. it belongs to the freshwater benthic shellfish of the family Muscovidae, which is common along the coast of China. It generally lives in the mud or sand bottom of lakes, rivers, ditches and ponds in fresh water, slow flow and still waters.

2. Hyriopsis cumingii: Hyriopsis cumingii, also known as Hyriopsis cumingii, Hyriopsis cumingii, freshwater pearl clam, Hyriopsis cumingii, etc., is widely distributed in Hunan, Hubei, Anhui, Jiangsu, Zhejiang and Jiangxi provinces, especially in Dongting Lake and medium-sized lakes in China.

3. Back horn toothless clam: back horn toothless clam, also known as vegetable clam, river clam, round clam, etc. it is distributed in rivers and lakes all over China, and the meat is edible. It is also suitable for bait for fish and poultry and feed for poultry and livestock. Some areas are used for freshwater pearl clam breeding.

4. Back tumor clam: back tumor clam, also known as hemp clam, etc., distributed in Hebei, Anhui, Jiangsu, Zhejiang, Jiangxi, Hubei, Hunan, Guangdong and Guangxi, especially in large and medium-sized lakes and rivers in the middle and lower reaches of the Yangtze River.

5. Dome pearl clam: the dome pearl clam shell is medium size, the shell is thin but hard, the shape is long oval, the length is more than 2 times the height, the two sides of the shell are asymmetrical, the front part of the shell is short and round, the back is not elongated, the end is slightly narrow and flat, and the shell surface is dark brown or black.