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Echinodermata comes from the term echino which means "spiny" and derm derives from the root "skin" so therefore, the phylum echinodermata means "spiny skin"
Echinodermata
The spines sticking out of their delicate skin account for their name.
Because it needs to protect against predators.
Echinodermata is derived from Greek, ultimately from the words "echino" (meaning "sea-urchin" - originally "hedgehog"), and "derma" (meaning "skin").
The phylum name Echinodermata means "spiny skin," derived from the Greek words "echinos" (spiny) and "derma" (skin). This name refers to the presence of spiny, calcareous skin covering the bodies of echinoderms, including sea stars, sea urchins, and sand dollars.
Star fish belong to the Phylum Enchindodermata Latin for "Spiny Skin". A phylum is the classification right under Kingdom. Star fish belong to the class Asteroidea which is Latin for "Starlike."
No, while crabs are indeed invertebrates thy have a carapace not a skin.
Echinodermata literally means spiny skin, and the group includes starfish, sea urchins and sea cumcumbers. Other invertebrates do have spiny skin, though, including many arthropods.
i don't know the answer but i need it because I'm doing research on the sea star.
Retraction of skin
chicharon