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This delicate feather star is resting on a piece of coral.
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Windows Original, adapted from Corel Photography

Echinoderms

Do you know what an echinoderm is? No? Bet you've heard of a starfish, though! Starfish, feather stars, urchins and lilies are all echinoderms.

An echinoderm doesn't have a head. Instead, they look like a bunch of legs tied together! The feather star and sea lilies are soft and easy to break.

But the starfish is well known because of its shape. Many people think starfish all have 5 legs. But some have as many as eleven!

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"Science, Evolution, and Creationism", by the National Academies, provides fascinating background on these topics for all, and is particularly useful for the Earth and space science classroom. Check our other books in our online store.

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