Snail is a common name that is applied most often to land snails, terrestrial pulmonate gastropod molluscs. However, the common name "snail" is also applied to most of the members of the molluscan class 
Gastropoda that have a coiled shell
 that is large enough for the animal to retract completely into. When 
the word "snail" is used in this most general sense, it includes not 
just land snails but also thousands of species of sea snails and freshwater snails.
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The practice of rearing snails for food is known as 
heliciculture.
 For purposes of cultivation, the snails are kept in a dark place in a 
wired cage with dry straw or dry wood. Coppiced wine-grape vines are 
often used for this purpose. During the rainy period the snails come out
 of hibernation and release most of their mucus onto the dry wood/straw.
 The snails are then prepared for cooking. Their texture when cooked is 
slightly chewy.
As well as being relished as gourmet food, several species of land 
snails provide an easily harvested source of protein to many people in 
poor communities around the world. Many land snails are valuable because
 they can feed on a wide range of agricultural wastes, such as shed 
leaves in banana plantations. In some countries, giant African land 
snails are produced commercially for food.