It uses its suction cups to crawl across a rock
Echinoderm
Echinoderm
Echinoderms
Echinoderms
Sea urchin
No, while crabs are indeed invertebrates thy have a carapace not a skin.
their spiny skin
they have no backbone this is true to all invertebrates
A sea cucumber is a soft-bodied animal, not a spiny-skinned animal.
A spiny skinned invertebrate is called a sand dollar. That is because they are are echinoderms (a type of invertebrate),
no
The scientific name for spiny-skinned animals, such as sea urchins and sea stars, is Echinodermata. This phylum includes marine organisms with a calcareous endoskeleton covered by spines or plates.