of course it is! look up sea urchin in the da dictionary!!!
the purple sea urchin
A salt-water body. Like a SEA or ocean. It says in the name SEA urchin.
the colors a sea urchin could be is black olive brown purple blue and red
They do, which keeps the sea urchin strong and not brittle.
No, not even remotely.
The Purple Sea Urchin's diet consists of plants, animal matter, including algae, dead fish, sponges, decaying matter, mussels, barnacles, and kelp. The Purple Sea Urchin is the prey of crabs, sunflowers stars, snails, most birds, fish, sea otters, and humans. The Purple Sea Urchin is actually a delicacy in some countries.
Who wants to eat a pincushion?
A purple sea urchin is not a mammal. Mammals are vertebrates while sea urchins are invertebrates. Additionally mammals are warm blooded, have lungs, have fur, give birth to live young (with the exception of the egg laying platypus), feed their young on milk. I don't think a purple sea urchin any of those criteria.
The purple sea urchin eats kelp and is getting to be something of a scourge.