This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
FMIB Clypeaster rosaceus Skeleton and Masticating Apparatus.jpeg check categories September Clypeaster rosaceus Skeleton and Masticating Apparatus Subject Sand dollarsAnatomy ClypeasterAnatomy Tag Invertebrates Cite book Ocean World Being Descriptive History of the Sea and its Living Inhabitants Fibuier Louis New York Appleton