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:
Clypeaster rosaceus Linnaeus derivate . es Clypeaster rosaceus Linnaeus shell without spines from above Clypeaster rosaceus Linnaeus internal organs from above Derivate date File Haeckel Echinidea Kunstformen der Natur plate Echinidea see mpizkoeln mpg de html here mpizkoeln mpg de html here mpizkoeln mpg de html