A sea urchin is an invertebrate because it does not have a backbone, in other words, the vertebral column
A sea urchin is an invertebrate.
yes
yes
Sea urchin's
The question is so simple that I wanted to say it. Well maybe it is not that simple for some other people. So the answer is : A sea urchin is an invertebrate because it has a backbone, or the vertebral column......
Sea urchin
No, sea urchins are animals. They are echinoderms (meaning "spiny skin") and are related to sea stars, sea cucumbers, and sand dollars. They eat kelp and other forms of algae.
A spiny-skinned invertebrate that lives on the ocean bottom floor is called a sea urchin.
Urchin
No, while crabs are indeed invertebrates thy have a carapace not a skin.
The classification of a Sea Urchin is Echinoidea
sea urchin