Life

Australia’s “Blue Tears”

  Jervis Bay, located in the southeast of New South Wales, Australia, is known for its white sandy beaches and clear waters, and is a great place for whale watching. However, in the southern hemisphere winter from May to August every year, the most beautiful scenery in Jervis Bay is undoubtedly the “blue temptation” staged by the luminescent organism Noctiluca nocturna. In the silent night, stepping into the water of Jervis Bay is like being in the fluorescent sea in the movie “Life of Pi”.
  Noctiluca is a single-celled organism that lives in the sea and emits a luminescent light when it senses changes in its surrounding environment. This glowing phenomenon has a romantic name – “blue tears”. “Blue tears” have also appeared in places such as the United States, Puerto Rico and Thailand, but the “blue tears” that have appeared in Jervis Bay in recent years have been particularly brilliant.
  Noctiluca often floats on the surface of the sea, and the sea water is white or reddish when it is still. Once disturbed, the nocturnal algae are stimulated to take on a fluorescent blue color. When the waves rush to the beach, the waves shine blue, and the beach will also be dyed blue after they pass through the sand. Children playing at the beach like to “make” neon blue in the puddles on the beach. They deliberately photographed oysters between the beach and the reef. The local people in Jervis
  Bay reminded not to deliberately put Apply the nocturnal algae to the face, especially not to let the nocturnal algae enter the mouth and eyes. But generally speaking, these small things attached to the body will not affect people. So, will people playing in the sea harm the nocturnal algae? Locals say that tidal and human disturbances are indeed “deadly” to the noctiluca, but judging from their reproduction methods and numbers, the damage is not enough to endanger their survival.
  Many people who go to Jervis Bay to watch “Blue Tears” will deliberately bottle some seawater containing nocturnal algae. These glowing pixies can survive for days or longer in cool water. During the day, nocturnal algae appear white or reddish in the water bottle; at night, just tap or shake the water bottle to reveal a shimmering fluorescent blue.
  From 2018 to 2020, Jervis Bay has seen breathtaking “blue tears” for three consecutive years. Although “blue tears” may happen anytime and anywhere, people cannot accurately predict when and where it will happen. Scientists believe that after the heavy rain, the nutrients that enter the seawater from the rain will become the “food” of nocturnal algae. Therefore, the days when the rain is over and the sky is sunny are the best time to explore “blue tears”.

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