Does sea urchin gives birth to a sea urchin?

I don't think so because sea urchins are ,in some way, related to coral i think they only repopulate on their own .

The young sea urchins develop inside womb like pouches inside the shell of female urchins until they are about 4 millimeters long and it's spines are fully developed.

No, a sea urchin and a sea anemone are two different sea creatures nothingalike. They do have some alike characteristics.like they both use their long tentacles , or spikes for protection.

No. Sea urchins are animals, which eat algae. They use there spines to make sure no fish eat them, and their mouths are on the bottom of them. They move around on almost invisible legs.

Sea urchins move using their tube feet and spines on the underside of their body. they use their water vascular system. THis is where they pump water into their feet and when they touch the ground...