Defensive strategies employed include the presence of spines, toxins, which can be inherent or delivered through the tube feet, and the discharge of sticky entangling threads by sea cucumbers. Being stabbed by a sea urchin may result in painful injury.
mollusks use their hard shell to defend from predators
A head, a visceral mass, and a "foot."
Its shell.
they are both invertebrates
the structures of defense can be their claws and sharp teeth
Mollusks have hard shells to help protect them.
nephridia
Stinging cells
It's neck
many minds
No ......mollusks are not segmented,like insects....just their body is partitioned into head, foot, and visceral hump..........but one can't take it as segmentation.........
Lionfish have poisonous spines.
it's hard shell
barbed structures known as trichocysts