clam
A shell is a mollusk that surrounds the body with two sheets of shells. The shell is interlocked by the abutment, and the shrink-proof shell is attached, and the shell is opened and closed. There is a mantle on the inside of the shell and a liquid with calcium on the mantle to make a shell. The shell has no head and no pelvis, and there is an axed foot, which is called a lack. Tribes use to dig into the ground or crawl. There is a plate-like gill that plays a role of breathing and filtering the food. Some are male and female, and some have sex depending on their age. Mainly in vitro fertilization. It is distributed everywhere in the water ecosystem, such as fresh water, seawater, salt water, mud, and fresh water, and it feeds on microorganisms in the water. It lives in the sea at the end where the waves of the sea are pushed in, and it lives in the intertidal zone to the depth of 10,000m.