they are in the shape of a star
their body plan
Echinoderms are invertebrates with an internal skeleton and a system of fluid-filled tubes called a water vascular system. There are four major groups of echinoderms: sea stars, brittle stars, sea urchins, and sea cucumbers.
Echinoderms can only be found in water, as they are aquatic. Some characteristics of Echinoderms are: Hard Skin, have arms or spines, have 5 body parts, organs found towards centre of body. Examples: Star Fish, Sea Cucumber, Sea Urchin
Some do but not all.
Echinoderms are invertebrates with an internal skeleton and a system of fluid-filled tubes called water vascular system.
Urchins
Echinoderms are not like any one animal. Echinoderms are invertebrates (no backbone), and are all animals with spiny skin (echin-spine, derm-skin). Some examples are starfish, sea urchins, and sea cucumbers.
the 8 groups of invertebrates are the arthropods, poriferans, platyheminthes, coelenterates, nematoeds, mollusks, echinoderms, and annelids
Echinoderms are in the Animalia kingdom.
The scientific name for Echinoderms is Echinodermata.
Echinoderms reproduce sexually and asexually.
Echinoderms belong to the phylum Echinodermata.