What are Sand Dollars?
The term extremely flattened, burrowing sea urchins belonging to the order Clypeasteroida.
Sand dollars, like all members of the order Clypeasteroida, possessa rigid skeleton known as a test. The test consists of calcium carbonate plates arranged in a fivefold rapid pattern -0.0c o oo oO 0.00
Sand Dollar Cake Urchin Sea Urchirn
On the ocean bottom, sand dollars are frequently found together. This is due in part to their preference for soft bottom areas, which are convenient for their reproduction.
In 2008, biologists learned that sand dollar larvae clone themselves as a mechanism of self-defense.