Sea Biscuits are echinoderms.echinoderms have segmented body therefore sea biscuits also have segmented body.
No. Sea urchins are echinoderms, meaning, appropriately enough, "spiny skin". Some of the characteristics of arthropods are jointed appendages, an exoskeleton, and a segmented body. While the hard test, or shell, of sea urchins could be thought of as an exoskeleton, sea urchins have no jointed appendages and do not have a segmented body. Some examples of arthropods are shrimps, crabs, lobsters, and insects.
A salt-water body. Like a SEA or ocean. It says in the name SEA urchin.
Skin
No, a sea wasp is a type of jellyfish, not an insect.
A sea urchin's body is covered in sharp spines.
The classification of a Sea Urchin is Echinoidea
sea urchin
It's a sea urchin.
It has a tiny mouth at the bottom of its body.
No. The leatherback sea turtle does not have a segmented body. The spine runs along the inside of the shell. The shell is nothing more than a large sandwich of keratin which protects the soft inner body.
A sea urchin does move, but not very frequently.