-morulla
-blastula
-gastrula
-prism
-pluteus (1st feeding stage)
-8 arm pluteus (w/ rudiment)
-juvenile
Strongylocentrotus purpuratus
(purple sea urchin)
Developmental sequence from newly fertilized egg to metamorphosis. When larvae are grown at 15 deg C and given plenty of phytoplankton, this process will take approximately four weeks. Our class cultures took approx. 31 days for both Dendraster excentricus (sand dollar) and S. purpuratus.