We have launched our mobile app, get it now. Call : 9354229384, 9354252518, 9999830584.  

Tags Current Affairs

Blue tide

Date: 28 November 2020 Tags: Biodiversity


Beaches in Maharashtra have witnessed the spectacle of bioluminescence. This phenomenon has created a term known as ‘blue tide’.



The spectacle occurs when phytoplankton (dinoflgellates) produce light through chemical reactions in proteins. Waves disturb these organisms making them release light.



  • Bioluminescence has been an annual occurrence along the west coast since 2016 during the months of November and December.  

  • The phenomenon has been observed across India’s coast as well as the coastline of many beaches in the world such as Maldives, Vietnam, Indonesia, USA, Australia, and many other countries. 



  • It is generally found in many marine organisms such as jelly fish, algae, worms, crustaceans, sea sharks, fishes etc.

  • Bioluminescence is an anti-predatory response. It causes predators to hesitate and prevent them from attacking the organism.


Impact of blue tide

  • Smaller blooms are harmless. Slow moving large blooms may an impact on deep sea fishing. This phenomenon indicates climate change.

  • Bioluminescence could also be caused by fertilizer runoff from fields or discharge of sewage into the sea.

  • Many of the species in this group are toxic. If dinoflagellates reproduce rapidly, they may cause so-called ‘red tides’. 

  • During this period all the animals (molluscs, fish, etc.) that feed on algae also become toxic due to the accumulation of high amounts of toxins.

Notice (8): Undefined variable: quizpole [ROOT/plugins/Studyiq/src/Template/Pages/tagdetails.ctp, line 161]