Shell foda yana nufin foda da aka yi ta hanyar murƙushewa da niƙa harsashi.Kashi 95% na sinadaransa sune calcium carbonate, chitin, da kuma karamin adadin amino acid da polysaccharides.Ana iya amfani da shi azaman babban kayan abinci, kayan kwalliya da kayan ado na ciki, kuma ana amfani dashi a cikin dabbobi da kaji.Ciyarwa da abinci abubuwan ƙara tushen calcium, sarrafa kayan ado, masu bushewa, da sauransu.