I am working on an alien races, they are like ant's their bodies muscles are coated in an exoskeleton. Their knees and elbows have two solid defense spikes, made of calcium they gather from the ground. Their main defense is the spikes and their claws, as well as their pincers. Their blood is lime green when hurt or injured they hide and shed the out shell while a knew one grows. For reproduction their hair are hollowed tubes that moved at will, it fills with a yellow fluid and fight their mates own for dominance. Who ever loses has to carry the egg along the ridges on its back. (which only open up during mating season) Two weeks later just for they hatch there left with a nurse underground to gather minerals and small critters till they can climb out. The queen is the biggest and strongest, if she shows any signs of weakness other can challenge her, but the Queen picks the game and the rules.