Info of things i couldnt fit in drawing:
If needed, they can grow out armor like skin on the outside of their body. The armor will be small fragments of their own bones/ Skeleton. Their bones/ Skeleton r so hard that it will never break, wich means the armor can never be penetrated. When the armor is not needed anymore it simply re-tracts(?) itself back into the body, like a cats re-tractable(?) claws.

If u need more info, just ask.

#Nerox
(Closed specie)