Yes, they are.
It is endoskeleton. Seahorses have an interior skeleton.
jellyfish worms starfish sea urchins coral sea anemones
jellyfish worms starfish sea urchins coral sea anemones
Worms, jellyfish, and sea anemones are examples of organisms with a hydrostatic skeleton and a soft body wall. These organisms rely on fluid-filled cavities within their bodies to provide structural support and movement.
The phylum Echinodermata has an internal calcareous skeleton made up of plates or ossicles. This skeleton provides support and protection for organisms in this phylum, such as sea stars and sea urchins.
The bony plates that make up a starfish's skeleton is the ossicles. They are found in not only starfish but sea cucumbers and sea urchins also.
No. Sea urchins live in the sea.
More sea urchins.
Some animals have that a hydrostatic skeleton include jellyfish and earthworms. Additional examples include sea urchins and starfish. As a result of their flexibility, hydrostatic skeletons are particularly useful for locomotion.
The classification of a Sea Urchin is Echinoidea
there are excatly 3million purple sea urchins
sea urchins eat kelp.