，海草;
;minute floating marine tunicate having a transparent body with an opening at each end.
身体透明、
端有孔并且有背囊
微小浮游海洋动
。
；有被膜
动minute floating marine tunicate having a transparent body with an opening at each end.
身体透明、端有孔并且有背囊微小浮游海洋动。
The name tunicate derives from a secreted protective covering (the tunic) containing cellulose.
被囊动
称来自它们分泌含纤维素保护性外罩（被囊）。
A tunicate (Halocynthia pyriformis) having a yellow or orange-red color and a sandpapery surface, found in shallow water along the northern Atlantic coast of North America.
海梨：一种被囊动（海桃），体呈黄色或桔红色，表面粗糙，生活于北美洲北大西洋海岸浅水区域中
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