What is the Difference between Sea Urchins and Sand Dollars?
Sand dollars and sea urchins both belong to the phylum Echinodermata, a group which contains other radially symmetrical animals such as starfish and sea cucumbers. Unlike starfish and sea cucumbers, sea urchins and sand dollars belong to the same class: Echinoidea. Members of this class are part of Echinodermata but have a few differences. The …
Read more What is the Difference between Sea Urchins and Sand Dollars?
