The name means "spined skin", from the greek. This invertabrate phylum have truly spiny (as in sea urchins amd sea stars) or apparently spiny (as in sea cucumbers) skin, are radially symetrical and are distinguished as being the only phylum except tardygrapsis that has no members that are parasitic. BTW: They have internal skeletons. They are not vertebrates. :)
porifera & echinodermata
The sea urchin is an example of the tubed feet and belongs to the phylum Echinodermata.
Spiny-skinned animals, such as sea urchins and starfish, have a hard exoskeleton made of calcium carbonate plates called ossicles. They have tube feet for movement and feeding, and their skin is covered in spines or bumps for protection. These animals typically have a water vascular system that helps with movement and feeding.
A statocyst is a sensory organ found in invertebrates, like mollusks and arthropods, that helps them maintain balance and orientation. It contains tiny particles called statoliths that move in response to gravity, allowing the organism to sense its body position relative to gravity.
Adult echinoderms have pentaradial symmetry, meaning they are typically organized in a five-fold radial pattern around a central axis. This unique form of symmetry is characteristic of this group of marine animals.
Deuterostomes that show radial symmetry in their adult form called phylum Echinodermata. Phylum Echinodermata are things like sea stars, sea urchins and sea cucumbers.
The symmetry of the larvae of echinodermata is bilateral.
A group of starfish collectively is called a tird. The phylum of starfish is called Echinodermata and the kingdom is Animalia.
The phylum Echinodermata which, contains about 6,000 species.
The brittle star belongs to the phylum Echinodermata.
Echinodermata
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Phylum Echinodermata
The scientific name for Echinoderms is Echinodermata.
Echinodermata comes from the term echino which means "spiny" and derm derives from the root "skin" so therefore, the phylum echinodermata means "spiny skin"
Echinoderms belong to the phylum Echinodermata.