夜や光こう虫ちゅう

noun

sea sparkle; Noctiluca scintillans

A bioluminescent dinoflagellate that causes the sea to glow at night. Often seen in warm coastal waters.

• 夏なつの夜よる、海かい岸がんで夜や光こう虫ちゅうが青あおく光ひかるのを見みた。

  On a summer night, I saw sea sparkles glowing blue at the shore.