Marine life reproduction is affected by night light pollution

you remember the warm clown fish Nemo's father and son in the movie Underwater Mobilization? Human-generated night light is light-contaminated for clownfish living nearby, and many Nemos may not have a chance to be born or see their father at all, according to a new Australian study.
, researchers at Flinders University in Australia and others report in the new issue of the British Journal of Biology that clownfish often lay their eggs on the shallow side of coral reef rocks, and that the hatching process is susceptible to nearby artificial light.
researchers experimented with clown fish in water tanks and looked at 10 pairs of clownfish in the spawning phase. Five of the clownfish were in light conditions that simulated normal day-night shifts, while the other five pairs were placed in constant dim light at night, simulating the lighting of coral reefs near human settlements at night. It was found that although both groups of clown fish lay their eggs normally, the hatching rate of clown fish eggs exposed to light at night was zero.
researchers believe that darkness is an important condition for the hatching of clown fish eggs. This may be because clown fish babies are so weak that fish eggs hatch in the dark and are not easily found by predators, helping to improve survival and forming mechanisms in long-term evolution.
addition, hatching clownfish babies will leave their parents and the original coral reef in search of a "new home", during this long journey, light will also pose a danger to clown fish babies.
not only clownfish, but the reproduction of other organisms in the ocean may also be affected by night light pollution. According to reports, at present, 22% of the world's coastal areas at night will be exposed to different degrees of artificial light. The researchers therefore called for a reduction in light pollution so that more "Nimos" would have a chance to meet their father. (Source: Xinhua News Agency)
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