A large amount off luorescent squid was found washed up on the coast of Sado City, Niigata Prefecture. We don't know the cause.
The firefly squid, or fluorescent, was washed ashore at Hayoshi Beach in Sado City, Niigata Prefecture. According to local fishermen they found a large number of firefly squid washed up on the beach on the beach for dozens of meters. It seems that the sandy beach was dyed in a light pink color, and the sand could not be seen.
According to Masaki Kobayashi, director of the "Firefly squid Museum" in Toyama Prefecture, where firefly squid is produced, it is a phenomenon called "firefly squid throwing itself".
It is a phenomenon that is rarely seen on the coast of Toyama Prefecture, and one of the reasons is thought to be that when firefly squid in the spawning season come near the coast, they lose their direction and wash up on the shore.
It is said that firefly squid can be caught in the waters of Sado City in early spring, but it seems that it is unusual for a large number of them to be washed up on the coast like this time.
The firefly squid washed up on the coast is very small, only 5 to 6 centimeters long, and the meat is tender. After marinating, it is a delicious appetizer with wine.
The most eye-catching thing about firefly squid is that it glows like a firefly. It has 3 different sizes of luminous body, the smallest luminous body is distributed on the belly, a total of 800. The larger luminous bodies are distributed under the eyes, and there are 5 in each. The largest luminous body is distributed on the squid's whiskers. After being stimulated, the luminous body on the squid's whiskers emits a bright blue light that is visible to the naked eye.
Why Fluorescent?
The light-emitting mechanism of firefly squid is similar to that of fireflies on land. The luciferin in squid reacts with luciferase to produce chemical luminescence without temperature. It's just that squid emits blue light, while fireflies emit yellow light.
In deep sea areas where sunlight cannot penetrate, firefly squid glow to illuminate the dark water.
The firefly squid washed up on the coast is very small, only 5 to 6 centimeters long, and the meat is tender. After marinating, it is a delicious appetizer with wine.
The most eye-catching thing about firefly squid is that it glows like a firefly. It has 3 different sizes of luminous body, the smallest luminous body is distributed on the belly, a total of 800. The larger luminous bodies are distributed under the eyes, and there are 5 in each. The largest luminous body is distributed on the squid's whiskers. After being stimulated, the luminous body on the squid's whiskers emits a bright blue light that is visible to the naked eye.
The light-emitting mechanism of firefly squid is similar to that of fireflies on land. The luciferin in squid reacts with luciferase to produce chemical luminescence without temperature. It's just that squid emits blue light, while fireflies emit yellow light.
In deep sea areas where sunlight cannot penetrate, fluorescent squid glow to illuminate the dark water.
Principle of the squid's counter-illumination camouflage. When seen from below by a predator, the bioluminescence helps to match the squid's brightness and colour to the sea surface above. Source: Wikipedia)
Fluorescent squid
The firefly squid (Watasenia scintillans), also commonly known as the sparkling enope squid or hotaru-ika in Japan, are widely distributed in the western Pacific Ocean, and they live in the deep sea area of 200-400 meters for most of their lives. However, at certain times of the year, fluorescent squid will come to the shallow water on the shore. For example, from March to May every year, Toyama Bay in Japan welcomes waves of glistening squid.
Interestingly, more than 99.9% of the fluorescent squid that illuminate the sea at night are pregnant females. Fluorescent squid only have a lifespan of 1 year. The tide of squid on the shore means that the fluorescent squid has reached the last moment of life. After the squid mother went to the sea to lay eggs, she ended her life.
The squid roe is only half the size of a sesame seed, connected in strings and floating on the surface of the sea. One week later, the fish eggs hatch, and the squid sinks to live on the bottom of the sea 200 meters below, waiting for the reincarnation of the next year.
Image of firefly squid / Wikipedia
Fluorescent squid are widely distributed in the western Pacific Ocean, and they live in the deep sea area of 200-400 meters for most of their lives. However, at certain times of the year, fluorescent squid will come to the shallow water on the shore. For example, from March to May every year, Toyama Bay in Japan welcomes waves of glistening squid.
Interestingly, more than 99.9% of the fluorescent squid that illuminate the sea at night are pregnant females. Fluorescent squid only have a lifespan of 1 year. The tide of squid on the shore means that the fluorescent squid has reached the last moment of life. After the squid mother went to the sea to lay eggs, she ended her life.
The squid roe is only half the size of a sesame seed, connected in strings and floating on the surface of the sea. One week later, the fish eggs hatch, and the squid sinks to live on the bottom of the sea 200 meters below, waiting for the reincarnation of the next year.
However, the fluorescent squid washed up on the shore contains a lot of sand, so it is not suitable for eating.
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The most eye-catching thing about firefly squid is that it glows like a firefly. It has 3 different sizes of luminous body, the smallest luminous body is distributed on the belly, a total of 800. The larger luminous bodies are distributed under the eyes, and there are 5 in each. The largest luminous body is distributed on the squid's whiskers. After being stimulated, the luminous body on the squid's whiskers emits a bright blue light that is visible to the naked eye.
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