If it is salty indicates that the sea water is not cleaned, dead before freezing.

Sea shrimp has a high nutritional value is also very rich, containing protein, fat, vitamin A, B1, B2 and niacin, calcium, phosphorus, iron and other components, often eat to protect our blood vessels, but also to prevent atherosclerosis, today I do brine-boiled shrimp, the meat is tender and tasty, the practice is simple and convenient. Shrimp and other aquatic products, the longer the water earth, the meat will slowly lose elasticity. So the next time you go to pick sea shrimp or chilled shrimp, be sure to choose those colorful and elastic.

Extended information:

Note:

Generally speaking, the intestines and other digestive systems of crayfish, often easy to gather heavy metals, should be pulled out of the shrimp line before cooking. Shrimp line on the back of the shrimp, is the shrimp not excreted waste, if eaten in the mouth with a muddy fishy flavor, affecting the appetite, so should be removed.

Shrimp contains high protein, calcium, phosphorus and other nutrients, if eaten together with food containing high amounts of tannins, will not only reduce the nutrient content of shrimp, but also make the calcium and tannins combine to produce an indigestible substance, leading to vomiting, dizziness, nausea, abdominal pain and other symptoms.

Baidu Encyclopedia - Shrimp

People's Daily Online - Eat Shrimp Note 5 Taboos Teach You to Identify Shrimp Freshness