You may have seen romantic and beautiful fireflies flying at night, but have you ever seen a beach that glows? In mid-April, every night, a large area of ??blue luminous seawater will appear near the Daheishi Bathing Beach in Ganjingzi District, Dalian. From a distance, it looks like a blue galaxy falling into the world. Dalian has also become the world's seventh "holy place" with charming blue beaches. What glows on the fluorescent beach is not actually the sea water or the sand on the beach, but the individual tiny, luminescent plankton accumulated on the beach.

The formation of fluorescent beaches

Fluorescent beaches mostly appear after the beginning of spring (about April and May). Usually due to the rise in temperature, wind and sea currents will glow a lot. The plankton is sent to the seaside and washed up on the beach; under the impact of the waves, the plankton will produce a stress response, and through the chemical reaction produced in the body, the chemical energy is converted into light energy and released, thus forming what we know See the glowing beach. If you observe carefully, you can also find blue ripples in the tracks of fishing boats going out to sea.

About luminous organisms

There are many types of luminescent organisms that form fluorescent beaches, the most common ones are algae and sea phoenix (an invertebrate). In fact, many marine organisms have their own luminous function. The main purpose of luminescence is to protect them, to warn predators, or to communicate with similar species.

The principle of luminescence

"Blue tears" are not the color of sea water. The luminous organisms that cause the phenomenon of blue tears are mainly: Noctiluca and sea fireflies. The species of sea firefly is Sea Firefly. Dinoflagellates represented by Noctiluca and sea firefly have luciferin and luciferase in their bodies. When stimulated by waves, etc., they react to produce light blue photobioluminescence, which is chemiluminescence. A sort of. Luminous organisms can synthesize luciferin and luciferase. Luciferin reacts with oxygen to produce light, and luciferase is a catalyst. For algae, the chemical reaction of luminescence usually occurs within the body of the algae; while sea firefly excretes luciferin and luciferase from the body together, and the two substances react with water outside the body.

Hidden dangers

Although fluorescent beaches are extremely beautiful, because most of the light comes from chemical reactions, they may be harmful to the human body. Therefore, if you decide to be a "light chaser", remember to protect your personal safety.

Known fluorescent beaches

There are only 7 places in the world that are strictly called bioluminescent beaches, located in Puerto Rico (3) and Australia (2 ), Maldives (1), Dalian, Liaoning, China (1). If you are going to chase light, remember not to shine or turn on a flashlight. Generally, the fluorescence lasts for a short time, and external light sources will affect the look and feel.

Data provided by Sougu Encyclopedia

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