The 27 Best Deep-Sea Species #10: Echinothuriid Sea Urchins

You have to go to Echinoblog for #10 because who better to write about echinoderms than Doc Echinoderm.  The quick and dirty of why these urchins make the list and begin our top 10?

The top spines in some species have big, puffy, balloon-like sacs with an offensive substancethese spines are functionally similar to hypodermic needles and may emit an offensive fluid to ward off unwanted visitors.

The Echinoblog: The 27 Best Deep-Sea Species #10: Echinothuriid Sea Urchins.

Dr. M (1720 Posts)

Craig McClain is the Assistant Director of Science for the National Evolutionary Synthesis Center, created to facilitate research to address fundamental questions in evolutionary science. He has conducted deep-sea research for 11 years and published over 40 papers in the area. He has participated in dozens of expeditions taking him to the Antarctic and the most remote regions of the Pacific and Atlantic. Craig’s research focuses mainly on marine systems and particularly the biology of body size, biodiversity, and energy flow. He focuses often on deep-sea systems as a natural test of the consequences of energy limitation on biological systems. He is the author and chief editor of Deep-Sea News, a popular deep-sea themed blog, rated the number one ocean blog on the web and winner of numerous awards. Craig’s popular writing has been featured in Cosmos, Science Illustrated, American Scientist, Wired, Mental Floss, and the Open Lab: The Best Science Writing on the Web.