Sea sparkle

Noctiluca scintillans emits a bluish-white light at night when it is stimulated.

Because the cells of Noctiluca scintillans contain large amounts of ammonia, it is harmful to ammonia-sensitive molluscs such as squid, although it rarely kills fish and shellfish.

In Omani waters, Noctiluca scintillans is cited as an example of red-tide plankton, most of which are not toxic.