A tortoise: it does not live inside a shell, it is a shell

Touching a tortoise’s shell is like touching someone’s hand through glass or putting your fingertip on a static electricity ball

Galápagos Tortoise San Diego Zoo Animals & Plants

The Tortoise and Its Care - Veterinary Medicine at Illinois

Helen Sullivan

Turtles are not inside their shells : r/BeAmazed

How a Giant Tortoise Gets Off Its Back - The New York Times

A turtle's shell is more than its home

A Tortoise and their Shell - Fact Sheet - Twinkl Pets

When Should You Come Out of Your Shell?

Could a turtle live outside its shell? - Mystery Science