Appearance characteristics:
Three-eyed dinosaur shrimp
The big dorsal shell of horseshoe crab is oval, and its abdomen is slender, soft and elastic. The long tail is forked. The body length is about 100 mm, * * * is divided into about 40 segments, and there are some leaflike appendages. Some have more than 70 pairs of limbs. Because it has three eyes, with black compound eyes on both sides and white sensitive eyes in the middle. Dinosaur shrimp got its name because it didn't disappear after the dinosaur period.
Because of the important biological information-diapause period, it escaped the Cretaceous period (the era of dinosaur extinction) with the three-eyed dinosaur shrimp. After the ice age, the earth woke up and the three-eyed dinosaur shrimp continued to complete their wonderful life journey. In this stop-and-go life journey, the three-eyed dinosaur shrimp has not evolved at all, and the Triassic still retains its original appearance.
2 Distribution scope editing
Three-eyed dinosaur shrimp
Three-eyed dinosaurs and shrimps are distributed in Japan, Russian Federation, Northeast China, North China, Northwest America, Africa, Australia, and some less distributed areas, such as south-central America, West Indies, Hawaii, New Scotland, Galapagos Islands and India. The strangest and most famous distribution is the top of Eier Rock (the largest rock in the world) in Australia.
It has been found in Sichuan, Jiangsu, Shandong and other places.
I'm from Shandong. I found it when I was a child. There was no camera at that time, and I was always worried. Later, I saw a report about this thing on the news, only to know that it was dinosaur shrimp.
Living habits
Three-eyed dinosaur shrimp
The survival period of horseshoe crab is about 90 days, but its diapause period is at least 25 years, that is to say, the eggs of crustacean dinosaurs can still hatch in a suitable environment after 25 years. Three-eyed dinosaur shrimp has a history of 200 million years, and the existing living fossils with unique molecules are related to ancient trilobite fossils. Eating mainly corrosive substances in water is not harmful to human body and farmland. [ 1]
Horseshoe crab is a typical benthic animal, which mainly eats biological debris or catches small aquatic organisms and their larvae. Horseshoe crab's eggs have strong vitality and are not afraid of drought. Their eggs will survive for many years after the pond water and lake water dry up, and will hatch when there is water.
About 15 The known horseshoe crabs are freshwater horseshoe crabs, which inhabit lakes and ponds. king/horseshoe crab
Drainage holes (5)
The big dorsal shell is oval, and the abdomen is slender, soft and elastic.
Growth and reproduction:
The life cycle of three-eyed dinosaur shrimp is not long, about 90 days, and the adult can reach 1 ~ 3 inches (about 2.5 ~ 7.5 cm). As for how big you can raise it, it depends entirely on how much sunshine and food you give it. After hatching, it will grow at an amazing rate twice a day. Their larval growth stage will quickly undergo multiple hulling (about once a day) and evolve into adults within 30 days. The origin of three-eyed dinosaur shrimp is a natural pond formed in rainy days, which is found all over the world. These natural ponds will dry up and disappear during drought, and adults will die because of lack of water, but their larva eggs will enter a special phenomenon in biology-"diapause period" because of drying up. Until the arrival of the next rainy season, the original low-lying land has formed a natural pond, and their eggs are nourished by rain, which will hatch out immediately and develop the next generation.
When entering the diapause period, the female three-eyed dinosaur shrimp will send out a biological message telling their eggs not to hatch, and they will stop hatching on the first 13 ~ 27 days after laying eggs. This biological information also informs their eggs that it is time to hatch when the next rainy season comes. This biological information may be a chemical reaction that tells eggs to stop their biological clocks through the female three-eyed dinosaur shrimp. According to the laboratory research of scientists, as long as it remains dry, the diapause period is at least 25 years. In other words, the egg of a three-eyed dinosaur shrimp will still hatch after being put in water for 25 years.
For details, please refer to Baidu's "Three-eyed Dinosaur Shrimp"
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