Until it is all grown up
Sea urchins and other echinoderms do not raise their young. They just lay the eggs and the babies have to fend for themselves when they hatch.
sea urchin
this this is a girls from il. who wants to know how long sea urchin's live yes, sea urchins live in hawia =)
a long time ago.
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.
The classification of a Sea Urchin is Echinoidea
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sea urchin
A sea urchin does move, but not very frequently.
because the crab needs the sea urchin for protection and the sea urchin needs the crab for food
Ummm...it's the thing from which a sea urchin hatches?
I think a sea anenome and a sea urchin can live together because i have a little aquarium and there is a sea urchin and and a sea anenome (if that's how you spell it) living in there and they were perfectly fine. BUT if you have a sea urchin do not have any crabs in there, because my sea urchin killed one, and almost killed another one by taking its claw off. :(