Introduce the habits of old fish? Pray for the great gods.

The "old fish" here is just a common name. There are two kinds here, one is perch pond and the other is perch pond. ? ? ? Glehnia littoralis belongs to Perciformes, Huvidae, Ophiopogonidae and Perch Pond, commonly known as "Shanpangtou", "Shagu Perch", "Yanghuan Fish" and "Laotou Fish" in English. The body is short, slightly spindle-shaped, with a cylindrical front and a flat back. The head is big and flat, the tip of the snout is flat and flat, there is a big bone protrusion in the middle of the snout, and the eye area is wide and slightly concave. Big mouth, upper position, oblique crack. The mandible protrudes slightly and then extends below the eyeball. There are villous pointed tooth bands on the maxilla, mandible and vomer. The tongue is wide and long, and the leading edge is round and free. The eyes are the same size, very prominent on the side, the upper edge is covered by eyelids, and the supraorbital protuberance is a bone ridge. Two pairs of nostrils, the front nostril is slightly tubular; The posterior edge of gill cover is spineless. Scales are medium-sized, with scales on the head and gill cover and no lateral lines. Two dorsal fins, not connected; The pectoral fin is developed and the trailing edge is round; The ventral fin is small, and the chest position is separated from each other; The trailing edge of the caudal fin is round. The back and sides of the body are dark brown or green brown, and the abdomen is shallow. There are irregular horizontal stripes on the side with brown edges; The first dorsal fin has 2 rows, and the second dorsal fin has 6 rows of yellowish green spots. There are 4 rows of gluteal fin and 6-7 rows of light green-brown spots on caudal fin; There are three brown-green stripes on the back edge and under the eyes. During the breeding period, the male fish has a beautiful peacock green wedding dress and white spots on the dorsal fin. I like living in still water of small tributaries of rivers, especially in bubbles covered with water. Not active, not traveling far; Resistant to hypoxia and able to survive under extreme hypoxia conditions. Strong wintering ability, able to lurk in underwater soil, and almost stop activities during hibernation; It can safely overwinter in shallow bubble marsh, so it is known as "Yang Huanyu". They mainly feed on insect larvae, beetle larvae and shrimp, and larger individuals also eat young fish. Generally, a 2-year-old fish with a body length of 6 cm begins to mature, and the spawning period is from early June to July. The suitable water temperature for spawning is 16-20℃. After laying eggs, the eggs are attached to aquatic plants and arranged neatly. Male fish have the habit of protecting eggs from hatching, and young fish take the initiative to ask for food 2 days after hatching. It is distributed in Heilongjiang, Tumen River, Liaohe River and other water systems, and generally produces bass ponds in swamps. It is a common fish with wide distribution and strong vitality. Because of their small size and living in swamps, there are many parasites and they are often unpopular. In fact, its meat is tender, its thorns are not so delicious, its nutrition is rich and its edible value is high. ? ? ? ? Fish? ? ? ? Branch:? ? ? ? Local family names: sea toad, toad fish, old fish and oral fish. Morphological characteristics: the front of the body is flat and the tail is cylindrical. Generally, it is 40~60 cm long and weighs 300~800 grams. It has a huge and flat head, a wide mouth, black and white markings in the mouth, and 1~2 rows of lodging fangs in the lower jaw. The body is soft and scaly, with brown back and gray abdomen. There are many cortical processes on the edge of the head and body. There are 6 independent fin spines at the front end of dorsal fin. The first spine is located on the back of the kiss, with cortical thorns at the top. The pectoral fin is wide and the sides of the body are arm-shaped; The gluteal fin has 8~ 1 1 fin. Each fin is dark brown. Distribution: It is distributed in the western North Pacific Ocean, and China is located in the northern East China Sea and the Yellow Sea. Season: The fishing season is from 1 1 month to April of the following year. Economic and nutritional value: fish is rich in vitamins A and C, and its tail muscle can be eaten fresh or processed into money pine. Its belly and roe are highly nutritious foods, the skin can be used as glue, and the liver can be made of cod liver oil. Fish bones are good raw materials for processing fishmeal with bones. ? ? ? ? Fish is also called old man fish because it sounds like an old man coughing. ? ? ? ? The fish's front end is flat and disc-shaped, and its body is pointed back into a column. Two eyes were born on its head, a blood basin was as wide as its body, and a row of sharp teeth with inward tips grew on the edge of its mouth. The ventral fin grows in the throat, and the pectoral fin on the side of the body has an arm. It usually lives under the water. The purple-brown body is smooth and scaleless, but there are many small white spots scattered. The whole body color is very similar to the bottom of the sea. ? ? ? ? Fish don't swim very much, so there are few opportunities to hunt. In the long-term evolution process, its dorsal fin has changed: the first dorsal fin gradually extends to the head, the first three spines of the dorsal fin are separated in front of the head, and there is a luminous petal at the end. When the small fish swims near the luminous point. ? ? The fish shakes the fishing tackle, lures the fish with cesium and sends it into the mouth. ? ? ? ? Fish have a big appetite and are often stuffed with sharks. It grows in the depths of the dark ocean, moves slowly and leads a lonely life. In the vast ocean, it is difficult for males to find females. Once they meet a female fish, they will depend on each other for life, and the nutrition of the male fish is also supplied by the female fish. Over time,? ? ? ? Fish form this unique mate relationship.