#真知新坐标 #
Blue-blooded Chinese horseshoe crab (hòu), scientific name: Tachypleus tridentatus, the cephalothorax is slightly horseshoe-shaped, so it is also called horseshoe crab, but not crab, and its tail has a long tail sword. Horseshoe crabs are far less closely related than spiders, both have four pairs of legs, and are taxonomically known as crayfish. Phylum arthropods, pteropodidae, lycopheae, and phylloscopus.
The Chinese horseshoe crab lives on the sandy seabed of the shallow sea and is a carnivorous animal, a feeding animal and a mollusk. Because the blood of the horseshoe crab contains copper ions, the blood of the Chinese horseshoe crab is blue.
The Chinese horseshoe crab is an ancient creature that lived on Earth as early as the Devonian Period more than 300 million years ago, and it is a period animal of the same period as the trilobite. At a time when primitive fish had just emerged and dinosaurs had not yet risen, the horseshoe crab was a marine dweller. Today, although it has changed over hundreds of millions of years, the species is still the same, so it is called "living fossil".
