CATDOLL : CATDOLL: What kinds of crabs are there?

1. What types of crabs are there?

Crab (scientific name: crab) is a crustacean of the order Brachyura, especially the species of the Brachyura tribe (true crab). It also includes some other types, such as the species of the Anomalura tribe, which has about 4,700 species. It is distributed in all oceans, rivers and land. The tail of the crab is different from that of other decapods (such as shrimps, lobsters, and crayfish). It curls under the chest and the carapace is usually wide. The first pair of thoracic legs are specialized into chelipeds. It usually moves by walking or crawling. The sideways gait of the common shore crab is familiar to people and is also a characteristic of most crabs. Species of the family Portunidae and some other types swim with flat paddle-like appendages, are agile, and have powerful large claws. my country has abundant crab resources, among which the hairy crabs produced by Taihu Lake hairy crabs, Gaoyou Lake hairy crabs, and Yangcheng Lake hairy crabs in the lower reaches of the Yangtze River are the best.

There are many types of crabs, most of which are edible. Most of the most eaten crabs come from the sea or freshwater lakes.

2. What types of crabs are there?

There are several types of crabs: Flower crabs

.Red crab.Blue crab.Three-eyed crab

.Crab roe, hairy crab, etc.

3. What types of crabs are there?

Crab: páng xiè

Explanation: 1. A common name for crab.

2. Also known as "crab".

Crabs are crustaceans, and their bodies are protected by hard shells. In biological taxonomy, crabs are classified as the same species as shrimps, lobsters, and hermit crabs. Most species of crabs live in or near the ocean, but some crabs live in fresh water or on land.

Crabs breathe through gills.

Biological classification

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:Animal kingdom, Arthropoda, Crustacea, Decapoda, Reptilia

Medical value

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Nature and flavor: salty, cold, slightly toxic. Meridians: enter the liver and stomach.

Efficacy: Nourishes the tendons and replenishes Qi, regulates the stomach and helps digestion, dispels heat, dredges the meridians, resolves knots and disperses blood.

Indications: Whole crab can cure evil in the chest

Qi stagnation, blood stasis, tendon and bone injuries; oblique swelling; boiled with wine and eaten to treat postpartum abdominal pain, lochia retention; crab shells to treat lacquer sores.

Crab's life habits and reproduction

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They rely on the mother crab to give birth to the baby crabs. Each time the mother crab will lay a lot of eggs, the number can reach millions or more. After these eggs hatch in the abdomen of the mother crab, the larvae can separate from the mother and float around with the coastal tide. After several molting, they grow into big-eyed larvae, which molt several more times to grow into young crabs. The appearance of young crabs is almost the same as that of adult crabs. After several more molting, they become crabs. Most marine crabs release their eggs directly into the ocean after they mature without hatching.

The hard shell on the crab can protect it from natural enemies, but the shell does not expand as the body grows. Therefore, the growth of crabs is intermittent, that is, the body will continue to grow after the old shell is shed after a period of time. The largest crab on earth is the spider crab, whose legs are 3.7 meters wide when spread out, and the smallest crab is the bean crab, which is less than half a centimeter in diameter.

Although crabs are small, they have all the organs. After removing the hard shell of the crab, we can find that the crab's body is protected by a layer of shell. These shield-like shells are called carapace by biologists. The crab's body is symmetrical and can be divided into the forehead area, eye area, heart area, liver area, stomach area, intestine area, and gill area. The two sides of the crab's body are connected by appendages. The appendages on the head are called antennae, which have the functions of touch and smell. Some appendages have mouth functions, which are used to tear food and put it into the mouth.

The crab's thorax has five pairs of appendages, called thoracic legs. The front pair of appendages has strong claws that can be used for foraging, and the remaining four pairs of appendages are the crab's feet. Crabs rely on these four pairs of appendages to move around. Their walking style is unique and interesting. Most of them walk sideways instead of straight ahead. However, monk crabs are an exception. They walk straight ahead.

Crabs spend most of their time looking for food. They are not picky eaters and will eat anything they can get their claws on. Small fish and shrimp are their favorites, but some crabs eat seaweed and even dead animals or plants.

Crabs eat other animals, and other animals may eat crabs. For example, humans consider crabs to be a delicacy. Water birds also eat crabs! Some fish also like to eat crab legs, just like humans. When young crabs swim in groups in the sea, they may be gobbled up by other marine creatures. That is why crabs lay a lot of eggs.

Fiddler crabs are common crabs on the seashore. Why are they called fiddler crabs? Because the way these crabs wave their large claws looks like they are waving at the tide, so the name "fiddler" comes from this. In addition, the large claws of male fiddler crabs look like playing a violin, so they are also called fiddler crabs or violinist crabs.

4. What types of crabs are there?

There are many, such as: swimming crab, Dungeness crab, red hairy crab, hairy crab, stone crab, three-spot crab, red flower crab, coconut crab...

5. What kinds of crabs are there?

Six-legged people are called "xi", four-legged people are called "bi"