What is a mollusk? -- What is a shell? -- Shell collecting -- Shell identification key -- The shells -- Chitons -- Bivalves -- Schaphopods -- Gastropods -- Cephalopods ...
Paracalliactis tsukisome, pale pink and soft-bodied, builds rigid, shell-like structures that hermit crabs use for protection—turning a passive invertebrate into an underwater architect. Uncovered ...