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March 9, 2006

Purple Sea Urchin Egg

A light microscope image of a purple sea urchin (Strongylocentrotus purpuratus) egg after fertilization. The outer circle area is called the vitellien layer. Purple sea urchins may be found on rocky bottoms and grazing intertidal and subtidal waters. They feed primarily on algae and brown kelp.

Restrictions for Use of this Image: Arizona State University (ASU) has allowed the National Science Foundation (NSF) to include this image in the NSF Multimedia Gallery. ASU encourages the use of this image, as well as other material from the ASU "Ask a Biologist" website. Distribution of this image is permitted under the following rules:

-material is not used for commercial or for-profit purposes
-credit for the material is clearly displayed, including copyright and author
-modifications are not made to the original material
-Ask a Biologist and individual authors retain the copyright for this image
-the user agrees to record their use of the image (or other material) via the ASU Ask a Biologist permission form; or by contacting C.J. Kazilek. (Year of image: 1988)


Credit: Image by Dr. Douglas Chandler; from Arizona State University's School of Life Sciences Ask a Biologist website.

Special Restrictions: See specific instructions from Arizona State University regarding use of this image under "Restrictions for use of this Image," in the caption (above).

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