Exactly what is a sea urchin? Click on the link below to find out.
https://www.youtube.com/watch?v=HXZQkl-lRD4
Check out what National Geographic has to say about sea urchins!
What interesting facts did you learn?
http://video.nationalgeographic.com/video/animals/invertebrates-animals/other-invertebrates/sea_urchin_breeding/
WATCH FIRST!!!
Let's watch cell division of sea urchins! It is cool!
http://www.exploratorium.edu/imaging-station/research/urchin/story_urchin1.php
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