Mullucks, also known as "mullocks" or "mullock," are a term used primarily in Australia and New Zealand to refer to spoil or waste material, particularly from mining operations. This can include the debris and leftover rock that is removed during the extraction of valuable minerals. The term may also be applied more generally to describe any kind of rubble or refuse. In some contexts, it can refer to a specific type of clay or sediment.
The hard shell protects the very soft body of the mollusk.
Mullucks, commonly known as mollusks, do not have a backbone. They are a diverse group of invertebrates that includes animals like snails, clams, and octopuses. Instead of a backbone, mollusks typically have a soft body and may possess a hard shell for protection. Their body structure is quite different from that of vertebrates, which do have backbones.