1, the region
The biggest difference between the lobster and crayfish is that the region is different. The former is the sea shrimp, the latter is the river shrimp. That is, one is seafood, one is river food.
Crayfish: Crayfish generally refers specifically to a scientific name called Crayfish shrimp. Native to Louisiana in the southern United States, this kind of a shrimp living in the river, belonging to the freshwater crayfish.
Large lobster: large lobster is a crustacean decapod order Cheloniaceae, or anamorphic crayfish family, true lobster, lobster, spiny lobster, Cicadellidae, Cicadellidae, Spanish lobster, shovel lobster and multi-crayfish lobster family, deep-sea lobster animals collectively. All are marine, benthic, mostly nocturnal. Origin is Central and South America and northeastern Mexico. Such as the Australian crayfish. China's distribution status has been extended to Shanghai, Jiangsu, Hong Kong, Taiwan and other places, forming a large number of natural populations.
2, appearance
From the appearance of the two can also be identified. The appearance of the biggest difference is that the crayfish is located in the chela-less under the eye is not a large pincer, which is the most intuitive difference. Chelae refers to the shrimp's large pincers. Strictly speaking, lobsters do not have chelae (pincers).
Crayfish: crayfish shaped like shrimp and hard shell, adult body length of about 5.6 ~ 11.9 cm, dark red, the carapace part of the nearly black, the back of the abdomen has a wedge-shaped stripe. Juvenile shrimp body is uniform gray, sometimes with black ripples. Chelicerae are narrow and long. The middle part of the carapace is not separated by a mesh-like space, and the carapace is distinctly granular. Frontal sword with lateral spines or the end of the frontal sword with scars.
Large lobster: most of the large lobster body is red, there are some other colors. It is a large cylindrical body, is the world's largest shrimp (currently the largest lobster 66 cm long, weighing 16 pounds). The carapace is firm and thick, the cephalothorax is slightly laterally flattened, and the anterior lateral margins are not fused with the anterior plate of the mouth except in the family of crayfish, and the lateral margins are not fused with the thoracic ventral armor and the base of the thoracic limbs, and the neck groove is obvious.
Note: There is also a kind of lobster with clips in the sea. The kind with two large clips should be called an arowana lobster. There are crayfish in both saltwater and freshwater, but freshwater crayfish predominate. Especially popular "Ma Xiaoer" (i.e. crayfish), is a typical crayfish. In addition, many Thai dishes with lobster is actually crayfish.
3, price
The two prices are also very different, in general, the price of lobster is expensive, are several hundred dollars a pound. Lobster is grown in the sea, lobster has a very high economic value and nutritional value, lobster contains very little fat and a lot of protein. Crayfish is a freshwater shrimp, crayfish prices are relatively affordable, generally up to a few dozen dollars a catty.
:Eat crayfish 5 notes
1, eat shrimp should not be served after vitamin C tablets
Researchers at the University of Chicago through experiments found that shrimp and other shellfish, containing a high concentration of "pentavalent arsenic compounds". The substance ate itself on the human body no toxic effect, but after taking vitamin C tablets, can make the original non-toxic arsenic compounds into toxic arsenic trioxide, that is, arsenic, can jeopardize human life.
2, home cooking and processing before water feeding for 24 hours
Experts said the public cooking crayfish at home, must be cooked at high temperatures to cook through, can be observed through the shrimp cross-section color consistency to determine whether to cook. It is recommended that before cooking and processing, be sure to water feed for about 24 hours, so that the shrimp body spit out metabolites. In addition, its body should be washed with a brush to clean the dirt, while the intestinal line, which hides a lot of sediment and bacteria, must also be removed, and then washed well with water 2-3 times.
3, allergy patients note that shrimp is not everyone can eat
Some patients with allergic diseases, such as bronchial asthma, recurrent atopic dermatitis, allergic diarrhea, etc., about 20% of the patients can eat shrimp can provoke attacks. Therefore, it has been clearly allergic to shrimp, in remission and seizures do not eat.