![](https://cdn.sci.news/images/2022/11/image_11382-Octopus-tetricus.jpg)
Shells
A seashell or sea shell, also known simply as a shell, is a hard, protective outer layer usually created by an animal or organism that lives in the sea.
A seashell or sea shell, also known simply as a shell, is a hard, protective outer layer usually created by an animal or organism that lives in the sea.