Brief introduction of blue tears in Dongshan island

1. Blue tears in Dongshan Island often appear in May-August, which is a rare opportunity.

2. "Blue Tears" is a microorganism that lives on the seabed. Because it is as small as sand, it is called blue sand in English. It lives on the energy of the ocean, but when the waves wash ashore, the blue tears leaving the sea can only survive for less than 10 second. With the disappearance of energy, the light of blue tears disappears, and its life is over.

3. Blue tears mostly appear in May-August, and are more frequent when spring and summer alternate. On a clear night, when the water temperature is almost 20 degrees, when dinoflagellate floats on the sea surface of Shanghai, a large number of tides and upwelling gather, and the south wind blows on the sea surface, blue tears may appear. In addition, the high tide at night is a good time to watch blue tears.