Know Yunlong Spot

Cloud grouper (scientific name: Epinephelus moara) is a serranidae, grouper fish. Body long oval, slightly flat and stout. The head is bigger than the height. The caudal shank is short and high. Kiss the short circle. The eyes are small, laterally superior, and the interocular septum is slightly elevated. 2 on each side of the nostril, with valves in the anterior nostril. Mouth large, end position, slightly oblique mouth fissure. Both the upper and lower jaws have teeth, the upper jaw has 2 conical teeth at the front end, the left and right teeth are smaller, and the mandibular teeth are fine and pointed. The gill hole is large, with 5~6 fine serrated spines at the lower corner of the anterior operculum bone, and the operculum membrane is not connected with the isthmus. The body and head are covered with fine ctenophores. lateral line 1, complete, parallel to dorsal margin.

The cloud grouper lives in the middle and lower sea areas with a water depth of less than 100 meters, reefs or muddy substrates. Cloud grouper adult fish ferocious, regional strong, generally not cluster. Cloud grouper is a carnivorous fish, there is the phenomenon of mutual encroachment, especially in the juvenile stage, small individuals are often swallowed by large individuals. In the natural sea area, fish, cephalopods, crustaceans and mollusks are the main food.

They are mainly distributed in China and Japan. In our country, it is called true oil spot. The real oil spot refers to the cloud pattern grouper, while in Japan, it is also a dream fish: Jiuhui (Ku Ku).

At the earliest time, the cloud grouper was considered to be the same species as the brown grouper (oil spot, false oil spot, soil spot), and later became independent. The cloud grouper has a better taste than the brown grouper and is relatively rare.

Yunlong spot is the product of hybridization between cloud grouper and saddle grouper. Because of its fast growth, strong disease resistance and cold resistance, it has replaced the cultivation of cloud grouper and appeared in the market on a large scale. Because of this, many behaviors such as breeding escape and release may have had a great impact on the ecological niche of cloud grouper. Yunlong grouper is very easy to recognize, striped and moire grouper is very different.

Recently, a large number of unnatural hybrid species have been found in the market and the wild. Later, it was found that they are groupers with groupers in the hybrid spots of cloud groupers. When they still have black spots on their heads, they are still relatively easy to distinguish from cloud groupers. However, most of the time, the black spots on their bodies can be removed like another hybrid grouper, Pearl Dragon, and it is very difficult to distinguish them...