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Heikegani (平家蟹, ヘイケガニ, Literal meaning: Heike Crab, Heikeopsis japonica) is a species of crab native to Japan, with a shell that bears a pattern resembling a human face – an example of the phenomenon of pareidolia – which is interpreted to be the face of an angry samurai, hence the nickname samurai crab.
A large crab with 15–20 cm of maximum length. Greyish green carapace is very broad and characterized by 3 red spots in posterior half. A strong spine can be seen on each side. Swimming legs are flattened and claws are long. [4]
Hemigrapsus sanguineus, the Japanese shore crab or Asian shore crab, is a species of crab from East Asia. It has been introduced to several other regions, and is now an invasive species in North America and Europe. It was introduced to these regions by ships from Asia emptying their ballast tanks in coastal waters.
As long as the gills stay moist, they can survive on land for four days. [71] Some scientists are skeptical that certain companies return their horseshoe crabs to the ocean at all, instead suspecting them of selling the horseshoe crabs as fishing bait. [72] The harvesting of horseshoe crab blood in the pharmaceutical industry is in decline. [73]
Bamboo shoots, water chestnuts and pepper can also be added. The outer covering is made of a thin sheet of lye water dough, which is either yellow or white. The center is usually garnished with an orange dot, made of crab roe or diced carrot, although a green dot made with a pea may be used. The decorative presentations vary.
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Arenaeus cribrarius has ten legs since it is a part of the order decapoda. [6] The first four pairs of legs have yellow tips and are used for walking. [6] These are referred to as broad pereopods. [6] They fifth pair of pereopods are used for swimming. [6] They are a wide flattened paddle shape. [6]
There are five pairs of long, thin, jointed walking legs. The front pair end in rather small pincers and the terminal joint of the others legs is a curved claw. The longnose spider crab may be confused with the portly spider crab, Libinia emarginata, but that species usually has nine spines on the margin at each side of the shell. [3]