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.
No. Sea urchins live in the sea.
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.
More sea urchins.
The classification of a Sea Urchin is Echinoidea
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.
there are excatly 3million purple sea urchins
sea urchins eat kelp.