Definition
The term 'single-shelled' describes creatures with a shell consisting of a single piece. Think of it like a unibody car, where the frame is all one piece. Snails are prime examples, carrying their homes on their backs. Unlike bivalves with two shells, these guys have just one, offering protection and support. The shape varies wildly, from spiraled cones to simple caps. Itβs a straightforward concept: one shell, one home. π