What is an echinoderm?

What is an echinoderms?

Echinoderms are a group of invertebrates that includes starfish, sea lilies, feather stars, brittlestars, sea cucumbers, and sea urchins and many others. There are about 600 species of echinoderms alive today. The articles listed below provide information about the characteristics, classification and evolution of echinoderms.



Echinoderms are a diverse group of marine invertebrates comprising approximately 6000 species. This profile explores basic facts about echinoderms including how they are classified, what they eat, where they live and the characteristics that make them different from other invertebrate groups.


Where is the mouth of a starfish located?

What type of invertabraes are echinoderms?

How many species of echinoderms are alive today?

Examples of echinoderms?

True or False? In the early 1980s, scientists found the first living sea flower since seen fossilized.