Every year, thousands of shells wash up on beaches around the world. Have you ever found a shell and wondered where it came from or what its function once was? These shells come from a large phylum of animals known as mollusks which includes members...

A shell is a hard, rigid outer layer developed by a wide variety of different animal species, including mollusks, crustaceans, turtles and tortoises, armadillos, and microscopic organisms. Shells are used for protection, locomotion, defence, structure...

This issue focuses on animals that have shells. Use this page to talk about horseshoe crabs and their shells. Explain that horseshoe crabs live in the water and use their tails to help them swim. Their tails help them dig in the sand...

What are shells? Have you ever collected shells? Shells are made by mollusks (mol-lusks). Mollusks are animals with soft bodies. Some mollusks, like, snails, have one shell Some snails live on land and others live in water. Oysters (oys-ters), clams, and scallops...