|Shells in the Ellobiidae family take a variety of forms. They may be short and ovate to elongate and conic, with a low or high spire. The shells usually have several folds or "teeth" projecting from the inner margin of the aperture. The organisms are land snails and air breathers that live in saline environments, above the high tide line, such as mangrove swamps and salt marshes. They feed on algae and other plant life. There are about 300 species world-wide and there is no collective name for them, though in Singapore they are called belongkeng. Only 2 species are found in Texas.