Recently, bioluminescent blue waves appeared in the backwaters of Kochi, Kerala, drawing tourists but causing concerns about environmental degradation among ecologists and fishers. Bioluminescence is the natural light produced by organisms like bacteria, fungi, and algae when coastal waters are disturbed. The main cause of this glow is Noctiluca scintillans, a type of plankton known as "sea sparkle". This glow happens due to chemical reactions in parts called scintillons, and it is usually blue but can appear red or brown depending on the plankton's concentration. The phenomenon is most commonly seen between March and May, known locally as "Kavaru" in Malayalam.
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