You probably haven't put much thought into it, but baby snails are born with tiny shells, although you may have a some difficulty seeing one.

Teeny Tiny New Snail Species Named After Picasso, Because Mollusks Are Artists Too This miniature work of art is so small you could fit six of its shells across a penny.

Different species of marine snails known as “sea butterflies,” such as Diacria trispinosa (shown), have distinct swimming styles that depend on the sizes and shapes of their shells. David ...

"The very thing that makes them different and interesting ... is, unfortunately, what's endangering them as well." ...