Malacology's the branch of invertebrate zoology which deals with the study of mollusks, the second-largest phylum of animals in terms of described species after the arthropods. One division of malacology, conchology,'s devoted to the study of mollusk shells. Those who study malacology are known as malacologists. Fields of malacological research include taxonomy, ecology and evolution. Applied malacology studies medical, veterinary, and agricultural applications, for example mollusks as vectors… (More on Malacology)