What is the marine animal called a sand dollar? Pancake sea urchin, pancake sea urchin, also known as sand dollar, is a kind of marine animal, belonging to the phylum Cnidaria. Its body is oblate spherical or similar to oblate, and its surface is covered with kraft paper-like bone plates, which can cover the sand around it. dust and seaweed to achieve good camouflage.
Pancake sea urchin
sea cucumber
Answer: Pancake sea urchin
The official name of the sand dollar is sea urchin. It is a kind of aquatic wild animal in the sea and belongs to the class Echinacea. It is different from the spherical sea urchin. The upper and lower sides of its carapace are obvious, with five petal-shaped areas arranged on it, which is very similar to the shape of a coin.
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