Morphosphaera caerulea is a metallic blue-green leaf beetle belonging to the family Chrysomelidae. It is primarily native to East Asia, including China and Japan (particularly the Ryukyu Islands). While the adults chew large holes directly through the foliage of Moraceae plants like fig trees (Ficus species), their larvae are famous leaf-skeletonizers. Their life cycle is remarkably fast: females lay eggs in tight clusters, and upon hatching, the larvae feed voraciously on leaves for roughly 9 to 15 days. Once mature, they burrow into the upper layers of the soil to pupate in underground chambers for about 12 to 15 days before finally emerging as adults. I encountered this cute, metallic beetle while walking through a park in Okinawa, Japan.