Night gnome (Noctiluca scintillans)

Japanese: ヤコウチュウ(夜光虫) - ヤコウチュウ(英語表記)Noctiluca scintillans
Night gnome (Noctiluca scintillans)
Kingdom Protista, phylum Alveolata, family Noctilineae. The body is spherical, about 1 mm in diameter, with the protoplasm concentrated in the center, from which protoplasmic filaments extend radially around the periphery, forming a mesh. The ventral surface is sunken with a longitudinal groove, and the mouth is in the center. Thick, long tentacles emerge from where the longitudinal groove ends. Dinoflagellates generally have two flagella, but this species only has one. It has no plastids. It is very commonly seen as a warm-sea plankton, and glows when stimulated. The protoplasm is pale pink, so if it grows abnormally, it will cause a pink red tide. It is found along the coasts of Japan and is distributed widely around the world.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:
原生生物界アルベオラータ門ヤコウチュウ科。体は直径 1mm内外の球形で,原形質が中心部に集まり,そこから網目をつくりながら放射状に原形質糸が周囲に伸びている。腹面は落ち込んでいてそこに縦溝があり,その中央部に口がある。縦溝の終わった部分から太く長い触手が出ている。渦鞭毛虫類は一般に 2本の鞭毛をもつが,本種では 1本である。色素体はない。暖海性プランクトンとしてきわめて普通に見られ,刺激により発光する。原形質が淡紅色なので,異常に増殖すると桃色の赤潮を示す。日本各地の沿岸で見られ,世界に広く分布する。

出典 ブリタニカ国際大百科事典 小項目事典ブリタニカ国際大百科事典 小項目事典について 情報

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