Military & Spy Tech
Best Fitness Trackers
Image of the Day
Gallery: Sea Urchins
Tanya Lewis, LiveScience Staff Writer | April 08, 2013 03:00pm ET
Images: Life Grows on Sunken Ancient Vases
Best Science Photos of the Week
In Photos: Auroras Dazzle Northern Observers
Cat Album: The Life of a Cheetah
Wow! The Most Amazing Images in Science This Week
In Photos: The Life of a Gelada Baboon
Credit: Jackie Sones
Purple urchins, or Strongylocentrotus purpuratus, live in tidepools along the West Coast of North America.
Credit: Claire Fackler, NOAA National Marine Sanctuaries
The urchin's spines help it skewer food and protect itself against predators.
Spawning female urchin
Credit: Dan Griffin
The urchins breed annually around January, February and March.
Credit: Elizabeth Lenz
The urchins start out as free-floating larvae that may swim and feed for several months.
Credit: Eric Sanford
Urchins undergo metamorphosis from a larval form to an adult form.
Credit: Andreas Heyland
Sea urchin larvae turn inside-out as the larvae metamorphose to adults.
Sea urchin genome
Credit: Mount Desert Island Biological Laboratory
Scientists recently sequenced the genome of the purple sea urchin.
Science Newsletter: Subscribe
More from LiveScience
About the Site
Advertise with Us
Using our Content
Licensing & Reprints
Tom’s IT Pro
Copyright © 2014 All Rights Reserved.