What are the deep-sea fish and the introduction of common deep-sea fish species

The species of deep-sea fish are diverse. At present, there are more than ten families. Generally, any fish that lives 600-2700 meters below the water surface will be called deep-sea fish. This kind of fish is characterized by a very large mouth, large eyes, and often a part of the body is luminous. There are two purposes of luminescence, one is to hunt, and the other is to attract mates for breeding. 1、 Salmon salmon is a carnivorous fish of Pacific salmon in Salmonidae. Its body is flat, spindle shaped, and its mouth is similar to a bird's beak. As cold water anadromous migratory fish, young fish generally live in the ocean for 3-5 years, and will return to the river to lay eggs when mature. It is worth mentioning that it only lays eggs once in its life and will die after laying eggs. 2、 There are many kinds of tuna, including six common species: yellowfin tuna, bigeye tuna, bluefin tuna, Longfin tuna, bonito and masu tuna. Yellowfin tuna is mainly distributed in the tropical and subtropical waters of the Indian Ocean, the Pacific Ocean and the Atlantic Ocean, and its growth rate is very fast. 3、 Lantern fish is a lantern fish living in the deep sea. Its scientific name is Pang. This fish is distributed in all oceans and is a carnivorous fish near the seabed. It has a fleshy protrusion on its head, which looks like a lantern. It contains gland cells, which can secrete photoelements and emit light under the catalysis of photoenzyme, so as to attract many phototaxic small fish to feast it. 4、 Tiger spot tiger spot is a kind of grouper. It belongs to warm water near the seabed fish. Its body is oval, its mouth is relatively large, and its teeth on both sides are thin and sharp. The meat of this kind of fish is fresh, tender, fat and nutritious, so it is deeply loved by people. It is worth mentioning that although it is a deep-sea fish, it can be cultured artificially. （ShenHaiYuYouNaXie，ChangJianShenHaiYuChongLeiJieShao）