https://echinoblog.blogspot.com/2012/06/some-colobocentrotus-diversity-aka.html
The Echinoblog: Some Colobocentrotus diversity! (aka the Shingle or Helmet Urchins!)
(photo by Emily Miller Kauai) So, recently I've gotten a bunch of questions about these peculiar sea urchins via email-and so I thought ...
diversityakashinglehelmeturchins