What are crustaceans?
Crustaceans are a group of animals that have a skeleton on the outside of their body. Their hard skeletons are made from calcium. They are invertebrates, meaning they have no backbone and belong to the group called anthropods, which have jointed legs and segmented bodies. Crabs, shrimps, lobsters and barnacles are crustaceans.
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Friday, January 18, 2008
What are crustaceans?
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