Are crabs a marine creature?

Are crabs a marine creature? Seafood is very rich in nutrients, so many people like to eat seafood. There are many types of seafood, and crabs are foods with relatively high nutritional value. But many people wonder, are crabs sea creatures? Are crabs marine creatures? 1

Crabs belong to the order Decapoda of the phylum Arthropoda, so they are arthropods. Specifically, they are crustaceans among the arthropods. The vast majority of crabs live in the ocean and are marine animals. But there are also a small number that live in fresh water and are freshwater animals. Most crabs are carnivorous and can eat fish, shrimp, and molluscs. A small number of crabs can eat vegetarian food such as algae and organic debris.

1. What kind of animal is a crab?

Crabs are a kind of animal that we are familiar with. From the category point of view, they belong to the class Phylum Arthropods and the class Softacea. Head. Therefore, from a classification point of view, it belongs to arthropods and belongs to the crustaceans among arthropods. Some of the physical characteristics of crabs are quite prominent, such as the fact that their bodies are covered with a relatively hard shell; another example is that they use gills to breathe. From the perspective of living environment, the vast majority of crab species live in the ocean and are marine animals; only a small part live in fresh water, and some also move on land.

From the perspective of feeding habits, most crabs are carnivorous. They can prey on many animals, including fish, shrimps and molluscs. However, there are also a few crabs that eat plants. They use algae and some organic debris in the water as their food.

2. Can crabs be raised?

Crabs are relatively common animals and are relatively easy to buy and can be farmed. When breeding, you can prepare a basin for them, put water in it, and then let them move around in the basin. The water doesn't have to be too deep, just enough to cover their shells. Food needs to be prepared for crabs according to their eating habits. Generally speaking, fish and shrimp are the two most common foods. During the breeding process, the crabs can also be allowed to bask in the sun, but it does not take too long. Are crabs sea creatures? 2

Crabs are seafood.

Crabs (páng xiè) belong to the order Sophia and Decapoda. They are crustaceans. Their bodies are protected by a hard shell and they breathe through gills. In terms of biological taxonomy, it is the same animal as shrimp, lobster, and hermit crab.

Most types of crabs live in the sea or offshore areas, and some live in fresh water or land. Common crabs include swimming crabs, sea swimming crabs, blue crabs and Chinese mitten crabs (river crabs, hairy crabs, clear water crabs), etc.

Living habits

A small number of crabs grow and reproduce entirely in fresh water, and they mostly live under rocks in mountain streams. There are also a few crabs such as ground crabs that can adapt to life on land. They live in moist mud holes and migrate to the sea during the breeding period.

Most crabs are omnivorous. Some crabs are carnivorous, such as swimming crabs, which can prey on fish, shrimps and molluscs. A few crabs, such as the femoral crab, scrape or filter feed algae and organic debris. Are crabs marine life? 3

Are crabs seafood?

Crabs are not seafood. Most of the crabs currently on the market are artificially cultured.

Are river crabs seafood?

River crabs and sea crabs are both called crabs, but river crabs live in freshwater rivers, so they are not seafood but river food. Seafood usually refers to edible creatures living in the sea.

River crabs usually live on the mud banks of rivers, lakes and swamps. They are active at night, feed on fish, shrimp, animal carcasses and grains, and lay eggs every autumn. And every autumn is also the time when river crabs are at their fattest. Eating river crabs at this time is definitely a great enjoyment in life.

Although river crabs are not seafood, their meat is very tender and tastes much better than sea crabs. However, dead river crabs cannot be eaten. We must put them into the pot while they are still alive. middle.

Nutritional value of river crabs

River crabs not only have better meat quality than sea crab sticks, but also have nutritional value that is not inferior to sea crabs. It is rich in protein, vitamin A, vitamin D and trace elements such as calcium, phosphorus, potassium, sodium, magnesium and selenium, which has a good tonic effect on the human body.

On average, every 100 grams of edible river crab meat contains 17.5 grams of protein, 2.6 grams of fat, 2.3 grams of carbohydrates, 267 mg of cholesterol, 389 micrograms of vitamin A, 0.06 mg of thiamine, and 0.28 mg of riboflavin. , niacin 1.7 mg, vitamin E 6.09 mg, calcium 126 mg, phosphorus 182 mg, potassium 181 mg, sodium 193.5 mg, magnesium 23 mg, iron 2.9 mg, zinc 3.68 mg, selenium 56.72 μg, copper 2.97 mg, manganese 0.42 mg.

From these data, we can see that river crabs not only nourish the brain and strengthen the body, but also promote bone development and prevent and treat various diseases. Among them, selenium is particularly effective in preventing and treating cancer. .

Moreover, according to traditional Chinese medicine, river crabs also have the functions of clearing away heat, dissipating blood knots, breaking wounds, regulating the meridians and nourishing yin. Therefore, you can usually eat some river crabs in moderation, which is good for the human body. Are crabs marine creatures? 4

Crabs are seafood. But it should be noted that not all crabs are seafood. Most types of crabs live in the sea or offshore areas, and some live in freshwater or land. Common crabs include swimming crabs, sea swimming crabs, blue crabs and Chinese mitten crabs (river crabs, hairy crabs, clear water crabs), etc. Among them, swimming crab, blue crab and blue crab are sea crabs, while Chinese mitten crab is a river crab and a river delicacy.

Are crabs seafood?

Seafood, also known as seafood, includes fish, shrimp, shellfish and other seafood. Although sea creatures such as kelp are often cooked into food, seafood is mainly made from animals. Among them, the fish include large yellow croaker, opium fish, smallmouth fish, turbot, sea black fish, and Mr. fish; the shellfish include Hawaiian clam, red lilo, red fan, king tamarisk, and conch; and the crabs include Swimming crab, blue crab, hairy crab, red crab.

Currently, there are about 4,700 species of crabs in the world, and there are about 800 species in my country, which can be divided into 6 categories: cotton crab pie, ancient short-tailed crab, sharp-mouthed crab, and pointed-foreheaded crab. Pie, Zodiac Crab Pie, Short Forehead Pie. Commonly related genera include male crabs, swimming crabs, creek crabs, fiddler crabs, and mitten crabs. The main ones that people eat are Portunus trituberculatus, Portunus crab, blue crab and Chinese mitten crab.

Among them, Chinese mitten crab is also known as river crab, hairy crab, clear water crab and hairy crab. It has the distinctive characteristics of "green back, white belly, golden claws and yellow hair". Blue crab is one of the important marine economic crabs in the southeastern coast. It is mainly distributed in coastal waters such as Hainan, Guangxi, Guangdong, Fujian, Zhejiang and Taiwan. It has the characteristics of fast growth, large size and delicious meat.