Soooo easy! Very peaceful animals that make fantastic pets. Everyone should have a seahorse!
The classification of a Sea Urchin is Echinoidea
The shell or skeleton of a sea urchin is called a "test." The test is made up of plates that are fused together, forming a hard, protective structure. This skeletal framework provides support and protection for the sea urchin's internal organs.
sea urchin
Yes, the uric acid decomposes the calcium structure the spines.
You can raise a sea urchin in a salt-water aquarium. There are no fresh water sea urchins so you would need a salt-water aquarium to properly care for the 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. :(
Spines of the sea urchin can cause injuries of the skin.
It urges the sea to adapt to IT! The litle urchin urger.
a blue tuxedo sea urchin