in the water
A sea urchin does move, but not very frequently.
by mating with another GIANT red sea urchin!
10 / 100
Sea urchins move by using tube feet on it's underside that work with the spines to help it move
The classification of a Sea Urchin is Echinoidea
sea urchin
the colors a sea urchin could be is black olive brown purple blue and red
Dominique Bureau has written: 'Red sea urchin'
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?
they are as an urchin has the ability to catch small fish or shellfish such as cockles and whelks it is well and truly able to eat plants and meat
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. :(