There are a lot of organisms that are in the Echinodermata family, the ones that you are going to see in this cool website are, Sea Urchins, Sea Stars, Sand dollars, Sea cucumbers, and if you're lucky maybe even some more. After you have done that you leave it in the oven for 20 min. Starfish Starfish Starfish Some of the major classes that echinodermata consists of are sea urchins, sea stars, brittle stars, sand dollars, and sea cucumbers.
Echinoderms are very different.
They do have a characteristic in common, they all live in Marine environments. That means that they live in a salt water environment. If they were to live in freshwater, they would be called aquatic. Most of the echinoderms have spiny skin in some way or another, and that's basically why they are called echinoderms.