On the surface of this sea fan, there are two polyps that are not polyps. 在这株海扇上,有2只"珊瑚虫"不像珊瑚虫
to both polyps and algae and between them, 不仅有益于给珊瑚虫和藻类
Corals thrive in these waters with the help of microscopic plants, algae that grow within the tissues of the polyps 珊瑚在一种微生植物的帮助下生长-海藻 是居住在珊瑚虫里的一种共生藻
and the polyps feed by snaring passing morsels with their tentacles. 珊瑚虫利用触手抓食经过它身边的食物
At night, the algae are inactive but then, the polyps put out even more tentacles 到了晚上,共生藻停止工作 珊瑚开始释放更多的触手