Endoskeleton is a skeleton within the body
no but what do they have
Endoskeleton. Only crustaceans, insects and arachnids have exoskeletons.
Yes, they , like other echinoderms have mesodermal endoskeletons made up of calcareous ossicles, (bony plates).
the mollusc skelleton is know as bonerius bonerorious. It is within the boner kingdom of skeletal life. boner.
An exoskeleton doesn't allow the animal inside to grow without being unprotected temporarily whilst shedding. Also, an endoskeleton provides a greater range of mobility. It also allows animals to grow far larger; that's why ants the size of elephants don't exist.
the way they hide from predators- like covering it self with sea grass