Sand dollars.
Yes sand dollar is an echinoderm.
Horizontial or vertical, depending on where you cut it.
A sand dollar
Sand dollar
Echinoderm
Echinoderm
echinoderm
Class Holothuroidea (sea cucumbers)
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No. A starfish is an echinoderm. It is considered an echinoderm for it's spiny/rugged skin around it's body. Just as well as sea urchins, and sand dollars too.
Four examples of echinoderm animals are: 1. Sea Stars 2. Sea Urchins 3. Sand Dollars 4. Sea Lilies
Sand Dollar