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海胆人工苗个体生长差异很大［１］。浮游幼虫变态参差不齐是造成附着后个体生长差异的重要原因。所以，人工诱导浮游幼虫变态在海胆苗种生产中具有重要的现实意义。作者于１９９９年在紫海胆 (Ａｎｔｈｏｃｉｄａｒｉｓｃｒａｓｓｉｓｐｉｎａ)人工育苗试验中，发现紫海胆浮游
Sea urchin artificial seedlings vary widely in individual growth [1]. Metamorphosis of plankton larvae is caused by an important reason for the difference of individual growth after attachment. Therefore, artificial induction of metamorphosis of plankton larvae has important practical significance in the production of sea urchin seedlings. The author in 1999 in the purple sea urchin (Anthocidariscrassispina) artificial seedling test and found purple sea urchin float