CATDOLL : CATDOLL: Do groupers live in fresh water or in the sea?

1. Do groupers live in fresh water or in the sea?

Rock cracks on the seaside

2. Is grouper a saltwater fish or a freshwater fish?

Marine fish

Grouper belongs to the family Pinnipedae ​​and the genus Epinephelus. It is a precious fish in the warm water near-shore bottom. The meat is plump, tender and nutritious, and is highly praised by people. Live fish are shipped to the Hong Kong and Macao markets and are regarded as top-quality delicacies, which are in short supply. It is expensive and has high economic value. There are 12 species of grouper distributed along the coast of Fujian. Among them, the species with higher economic value and more common are red-spotted grouper, salmon-spotted grouper, clouded grouper and reticulated grouper. Red-spotted grouper and clouded grouper. Blue grouper is also called blue grouper because of its bluish-brown body color. It is a species with a large production in Fujian. Grouper has an oval body, flattened sides, a large head, a short and blunt snout, a large mouth, a well-developed paved bone, a body covered with small ctenoid scales, a strong dorsal fin, and a body color that can change with environmental changes. Adult fish are usually 20-30 cm long.

Groupers like to live in the sea areas with rocky reefs, gravel and coral reefs near coastal islands. They usually do not live in groups. The water layer they live in rises and falls with the water temperature. In spring and summer, they are distributed in waters 10-30 meters deep, and in midsummer, they can also appear in waters 2-3 meters deep. In autumn and winter, when the water temperature drops, they swim to deeper waters of 40-80 meters. The suitable temperature range is 15-34℃, and the most suitable water temperature is 22-28℃. The suitable salt range is wide, and they can survive in seas with salinity above 10‰. They are carnivorous and ferocious fish, and they prey on benthic crustaceans, various small fish and cephalopods by surprise.

Groupers are hermaphrodites with sex-changing characteristics. When they first become sexually mature, they are all females, and they change to males the following year. Therefore, males are more obvious than females. They can reach sexual maturity at one week old. The number of eggs they carry varies with the size of the fish. For example, the number of eggs carried by blue groupers is about 150,000 to 200,000. They lay eggs in batches. The floating eggs are round and have oil balls. After hatching, the young fish feed and grow along the coast. Groupers grow rapidly. For example, salmon-spotted groupers can grow to 250-300 grams in one year, and the weight of two-year-old fish can reach 500-600 grams, and the weight of three-year-old fish can reach 800-900 grams; red-spotted groupers and blue groupers, one-year-old fish weigh 200-250 grams, two-year-old fish weigh 400-500 grams, and three-year-old fish weigh 700-800 grams.

Fujian Province has a long history of fishing for grouper. According to records, the silver carp fishing industry in Pingtan County began in the Qing Dynasty and has a history of 300 years. April to November is the silver carp fishing season, and May to October is the peak season. There is a saying that "silver carp are full under the rocks at the beginning of summer." Longline fishing and hand fishing are the main fishing tools for catching grouper. In 1993, the output reached more than 1,900 tons, and the output of the main production areas of Pingtan County and Lianjiang County exceeded half of the province. At present, grouper farming has three forms: cage farming, embankment farming and pond farming, and has become a foreign exchange-earning fishery in the coastal areas of Fujian Province. Most of the farmed seedlings come from small-sized fish caught in natural sea areas. In recent years, blue grouper has begun to be artificially raised in batches, opening up broad prospects for large-scale development of grouper farming.

In 2007, a team of experts from 10 different countries studied the survival of red grouper around the world and found that 162 species of red grouper were registered, of which 29 species were endangered due to overfishing. In 1958, the production of red grouper in the Bay of Campeche, Mexico reached 248,548 tons, but in 2004, the production dropped to 52,354 tons.

Raw materials introduction

Grouper belongs to the family Pinnipedae ​​and the genus Epinephelus. It is a precious fish in the warm water near-shore bottom. It is highly praised by people for its plump and tender meat and rich nutrition. Live fish are transported to the Hong Kong and Macao markets and are regarded as top-quality delicacies, which are in short supply. It is expensive and has high economic value. There are 12 species of grouper distributed along the coast of Fujian. Among them, the species with higher economic value and more common are red-spotted grouper, salmon-spotted grouper, moire grouper and reticulated grouper. Red-spotted grouper and moire grouper. Blue grouper is also called blue grouper because of its blue-brown body color. It is produced in large quantities in Fujian and is the best among groupers. Grouper has an oval body, flattened laterally, a large head, a short and blunt snout, a large mouth, a well-developed paved bone, a body covered with fine ctenoid scales, a strong dorsal fin, and a body color that can change with environmental changes. The body length of an adult fish is usually 20-30 cm.

Nutritional analysis

1. Grouper has high protein content and low fat content. In addition to the amino acids necessary for human metabolism, it is also rich in a variety of inorganic salts and iron, calcium, phosphorus and various vitamins;

2. The nutritional components of fish skin gelatin play an important role in enhancing the complete growth of epithelial tissue and promoting the synthesis of collagen cells. It is known as the fish of beauty and skin care. It is especially suitable for women to eat after childbirth.

Related groups

Edible for everyone

Production Guidance

Grouper is mainly wild and natural. The bigger it is, the more tender the meat is. The meat is tender and thick, without intramuscular bones, and tastes delicious. It is often cooked by roasting, stir-frying, steaming, stewing, etc. It can also be made into meatballs, meat fillings, etc. Representative dishes include steamed grouper.

Dietary effects

Grouper has medicinal value of strengthening the spleen and replenishing qi.

3. Freshwater Grouper Porridge

Grouper Porridge

1: First, cut the fish into slices about 1 cm thick. Add a little cooking wine, salt, pepper, oil, egg white, and cornstarch to the fish slices and mix well for later use. 2: Chop the remaining fish bones and fish head into small pieces. Heat a little oil and ginger slices in a hot pan and stir-fry the fish bones. Add water, bring to a boil over high heat, and simmer for 20 minutes over low heat to make a milky white soup base. 3: Add the cooked soup base to the cleaned rice and bring to a boil.

4: Add diced mushrooms and carrots. (You can freely mix and match vegetables, add whatever you like) Add appropriate amount of salt and chicken powder to the porridge for seasoning. 5: Cook the porridge over low heat, and add the marinated fish fillet when it is 90% cooked. (Don't stir it vigorously at this time, otherwise the fish will break)

6: Add chopped greens before serving. (You can add cilantro to make it more fragrant, but children generally don’t eat it, so I choose to add greens for more comprehensive nutrition.) 7: Serve in a bowl, sprinkle some pepper and start eating.

4. Which is better, freshwater grouper or saltwater grouper?

The saltwater grouper is definitely the best, because the salt in the seawater makes the grouper itself fresher, and it will be good if it is cooked without seasoning. The freshwater grouper tastes lighter, and the meat is not as delicate and firm as the saltwater grouper.