In the former case, the light - emitting cells and organs contain a chemical called luciferin, which reacts with oxygen in the presence of an enzyme, creating light that is usually blue to green in color.
وهذه القدرة ،‏ المسماة التألُّق الحيوي ،‏ يمتاز بها ايضا الكثير من المخلوقات البحرية من قناديل البحر الى القريدس .‏