Mollusca (Molluscs) is a phylum of animals. There are 80548 species of Molluscs, in 9238 genera and 923 families. It includes groups like Snails, Cephalopods, and Mussels.
Definition: Sediment is an environmental substance comprised of any particulate matter that can be transported by fluid flow and which eventually is deposited as a layer of solid particles on the bedor bottom of a body of water or other liquid.