They are lines of growth. However, this is not true of the bearded clam.
'Clam' in Italian
It mean their clam
The mantle in a clam is a thin layer of tissue that surrounds the body and lines the inside of the shell. It is located between the body and the shell of the clam and plays a role in secreting the calcium carbonate that forms the shell.
A local clam found along the New England seashore of the U.S.A..
"Clam up" means to stop talking, especially when nervous, shy or unhappy. Example: A lot of men clam up when they are having emotional problems.
Calmness, Calmly
clam
Almeja means 'clam' in Spanish.
It means to stop talking. A clam has two parts that open when they are steamed.
The name of the plastic piece that holds the lines to the expansion valve in a 1995 Toyota Camry is called a clam shell ventilator. As of 2013, the clam shell ventilator can be purchased for around $10, plus tax and shipping.
You will see a clam.
The rings on a clam's shell are growth rings that indicate the age of the clam. Each ring represents a year of the clam's life, similar to tree rings. By counting the rings, scientists can determine the age of the clam.