One of the most spectacular sights on a night dive in the ocean is to witness the blue waves in a dark night, it seems to be tiny blue stars illuminating in the sea shores. These tiny star like structures are bio-luminescent phytoplankton. This bio-luminescent effect produce by these plankton is due to certain chemical reaction. When certain types of chemicals mixed together produce energy which ‘excites’ other particles on vibration and generate light which causes the glow. The group of chemicals involved to make plankton glow are broadly termed luciferins and the light is produced by a series of oxidation reactions set off by a catalyst called luciferase. This bio-luminescent effect is a defense mechanism for these dinoflagellates (phytoplankton) to cautioned there predators.