Pictures of horseshoe crab fish blood:

The horseshoe crab fish belongs to the family of arthropods, limbostomatidae, sabre-tailed order, horseshoe crab family. Horseshoe crabs are mainly distributed in the Pacific Ocean, the western Indian Ocean Monarch Island and Southeast Asian waters more algae on the sandy seabed. Chinese horseshoe crabs are non-toxic and edible, round-tailed horseshoe crab meat and eggs are not edible, many places to this thing as a special dish, in fact, this creature contains a large number of copper ions and bacterial viruses, consumption may be fatal.

The horseshoe crab fish is an ancient creature, as early as 300 million years ago in the Devonian period on the earth, and still maintains its form, known as the ancient relics of the sea, which is the same period with the trilobites of the period of animals. Although the vicissitudes of hundreds of millions of years, but the species is still the same, little change. Therefore, there is a "living fossil" called.

Extended information:

Morphological features:

The body length is about 70 centimeters. Dioecious, females are larger than males. There is 1 pair of single eyes in the anterior center of the dorsal surface of the carapace, and 1 pair of larger compound eyes on both sides slightly behind. There are 6 pairs of appendages on the cephalothorax, the chelicerae are small, and the remaining 5 pairs are large, and are used for walking and feeding.

The abdomen is triangular in shape, its segments are fused to each other, and there are 6 notches on both sides, each with a short spine in the notch. At the end of the abdomen, there is an elongated and freely rotating caudal segment, which is prolonged like a sword and serrated, so that horseshoe crabs can utilize the caudal segment to hold themselves up.

Baidu Encyclopedia - Horseshoe Crab Fish