There is a whole science that studies Seashells of invertebrates and is called conchology.
Conchology, conchology or conchioliology (from other Greek, κόγχη, κογχύλιον - "shell" and λόγος - "doctrine") - a section of zoology that studies shells, mainly mollusks. Specialists in the field of conchology are called conchiologists. In a broad sense, this is a scientific, semi-scientific, or amateur study of mollusk shells.
How many important things are in our world, which people study. And where are the results of these studies.
up! 
up! 