MARINE LIFE
'(<a href="http://www.j-archive.com/media/2007-01-19_DJ_28.jpg" target="_blank">Cheryl of the Clue Crew reports from Catalina Island.</a>) The inner cavities of sea urchins contain 5 sets of <a href="http://www.j-archive.com/media/2007-01-19_DJ_28a.jpg" target="_blank">invertebrate eggs</a>, known by this 3-letter name'
roe