300 Noctiluca scintillans 夜光藻 Phylum: Dinoflagellata 门：甲藻門 Class: Noctilucophyceae 纲：夜光藻綱 Order: Noctilucales 目：夜光藻目 Family: Noctilucaceae 科：夜光藻科 Morphology Cells are solitary, large, athecate, spherical to subspherical in shape. The epicone and hypocone are not differentiated. Cells have deep and wide ventral groove, with a flagellum and a prominent tentacle transversely striated and extending posteriorly. The chloroplasts are absent and a number of food vacuoles containing prey organisms such as diatoms and ciliates are often present within the cytoplasm. The presence of photosynthetic symbionts can cause the cytoplasm to appear pink or green in color. 形態 夜光藻單個生活，粒徑較大，不具甲板，球形或接近球形。上殼和下殼不能區分。 細胞腹槽較深較寬，具一根鞭毛和一個帶橫條紋向後伸的觸手。細胞不具色素體， 經常可以觀察到包含攝食的硅藻、纖毛蟲等食物的食物泡。細胞內的一些光合共生 體會導致細胞呈現粉紅色或綠色。 Ecology and distribution Noctiluca scintillans is a cosmopolitan planktonic species distributed in neritic and coastal regions. It is phagotrophic, feeding on phytoplankton (mainly diatom and dinoflagellate), protozoans, detritus, and fish eggs. Noctiluca scintillans is bloom forming species and caused more than 600 blooms in Hong Kong coastal waters from 1975 to 2023. It may be associated with fish and invertebrate mortality events in blooms due to the excretion of high concentration of ammonium, depletion of oxygen levels in the water
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