Chondroscleroderma of sturgeon belonging to the genus Acipenser of the family Acipenseridae.

What is the picture below? Chinese sturgeon?

Sturgeon is a kind of mild carnivorous fish, and it likes draught worms, Daphnia, mosquito larvae, Artemia and bottom wild fish all its life. Its breeding season is from May to July.

The picture below shows the sturgeon?

The body is long and straight, the kiss is short and blunt, the abdomen is flat, the body surface is covered with five bone plates, the mouth is located on the ventral surface of the head, with transverse fissure, the upper and lower lips are developed, there are two pairs of transverse fissure tentacles in front of the mouth, the eyes are small, a pair of nostrils are located on the kiss, in front of the head, the water spray holes are underdeveloped, the tail fin is crooked, and the upper leaves are developed and covered with needle-shaped diamonds. The body color of ACIPENSER schrenckii is grayish black or grayish brown above the lateral bone plate, milky white between the lateral bone plate and the abdominal bone plate, and the abdomen is mostly yellowish white.

Sturgeon family? Polyodonta? Paddlefish? Psephurus？ Cartilaginous scleroderma

The picture below shows the paddlefish? Swordfish (declared functionally extinct)

The body is spindle-shaped, slightly flat at the front, stout at the middle and slightly flat at the back. The head is extremely long, more than half of its length, with plum blossom traps on it. The kiss is sword-shaped, especially long, with a narrow and flat front end and a wide and thick base. Kiss the ventral surface of the head, and the ventral surface can stretch freely. The upper and lower jaws have small, pointed teeth; A pair of kissing whiskers, short, located on the ventral surface. Small eyes. The whole surface of the head membrane is densely covered with many fine plum-blossom sensory nerve cells. The gill holes are large and the body is smooth and scaleless. The upper leaf of caudal fin has 8 prismatic scales, which extend backward to the upper leaf of caudal fin. The dorsal fin starts from the back of the ventral fin and consists of unbranched fins. The caudal fin is curved, the upper leaf is developed, and there is a row of prickly scales in the front edge.

What is the picture below? Flat-nosed fish without scales? , commonly known as Xinjiang bighead carp

Kaidu River, Aksu River, Qierqin River and Yeerqiang River distributed in the Tarim River system in northwest China.

National secondary education

Stonefish? Yellow-lipped fish Bahaba sea fish

The picture below shows yellow-lipped fish? Taiping Island? , commonly known as white fish, Huang Ao fish, big rock fish, money flounder, money? ?

Body length, flat side, slender tail stalk, snout, head covered with round scales, body surface covered with silver comb scales, brown gray with orange on the back, gray on the ventral side, and a black spot under the pectoral fin; Eyes like two bells, on one side; Mouth position, oblique crack; Small teeth and enlarged upper and lower incisors; The dorsal fin is continuous; The second fin spine of the gluteal fin is thick and long, and the caudal fin is wedge-shaped.

Endemic to China, with a maximum length of 2m and a maximum weight of 65,438+000kg, it is the largest species of grouper in the world and the South China Sea. 1930s was first described in the western scientific community, and its distribution range was narrow, limited to the southern coast of China, which was very rare. Yellow-lipped fish is one of the "Top Ten Marine Treasures" selected by WWF, which is the most endangered but least concerned. Yellow-lipped fish are also cultivated in China. Jelly made from the swim bladder of yellow-lipped fish is very precious and is often regarded as a family heirloom.

Du Fu Fish Family? Cotico? Songjiang perch? scad

The picture below shows the perch? Songjiang perch, commonly known as? Daughter-in-law fish, four-sided bass

Big mouth, long body, silver gray, back and dorsal fin? There are small black spots on the ground, which inhabit offshore and enter fresh water. They generally feed on fish and shrimp, and their meat is delicious. The front of the fish is flat and the back is slightly flat. The head is flat, and the spinous process and edge are covered by membrane. Big mouth, end position; The end of the maxilla extends to the end of the posterior edge of the pupil. There are 4 spines in the anterior branchial lid, the upper spine is the largest, and the back end is bent upward. The upper jaw, upper jaw and hoe all have long fluffy teeth. The body has no scales and there are small protrusions on the bones. 2 dorsal fins, continuous; The pectoral fin is wide and the lower fin has no branches; The caudal fin is convex. The back is brown, the abdomen is white, and there are 4 dark horizontal spots on the head. The second to fourth hard spines of the first dorsal fin are stained with dark color; The second dorsal fin, pectoral fin, anal fin and caudal fin all have stripes formed by brown spots. The body length can reach 14 cm.

What is the picture below? Kellogg of hippocampus, commonly known as? Sea horse

Cyprinidae, myxocyprinidae.

The picture below shows the mullet, also known as yellow steak, blood steak, vermicelli steak, burnt snapper, wood leaf plate, red snapper, wood leaf fish, purple snapper, finch fish, fire steak and Chinese sail fin sucking fish.

Myxocyprinus asiaticus juveniles are brown with three dark stripes. The obvious difference between adult male fish and female fish is that the male fish is rouge red and the female fish is deep purple with broad vertical stripes. Another important feature of the mullet is the towering triangular dorsal fin, which extends to the back of the gluteal fin. Its fleshy lips are thick and there are nipples on them, so it is unnecessary. The pharyngeal teeth of Myxocyprinus asiaticus are arranged in a single row in a comb-like arrangement. With the increase of age, the body color of adult mullet will become darker and darker; In old age, the characteristics of white stripes will disappear.

Cyprinidae? Cyprinidae? A fish of the genus Tangyu.

What is the picture below? Tanichthys albonubes, commonly known as Baiyun Mountain Fish, Baiyun Goldfish, Red-winged Fish, Red-tailed Fish, Golden Lantern, Guangdong Crucian Carp, Panshi Crucian Carp?

This female fish is stout and dull in color. Tang fish is very easy to breed, which is very suitable for lovers who are in contact with tropical spawning fish for the first time to carry out experiments. The suitable water temperature is about 22 ~ 25℃, the water hardness is 6 ~ 8, and the pH value is about 7.0. A layer of natural antipyretic or brown silk sterilized by high-temperature hot water is laid as the hatching nest of fish eggs. Then, according to the male-female ratio of 1: 1 or 1:2, completely mature and healthy parents are selected and put into the breeding pool. In a quiet environment, the male and female fish will soon enter the "estrus" state, and the male fish will keep chasing the female fish until the female fish lays eggs in the aquatic plants, and the male fish will immediately fertilize it. Fish eggs are white, transparent and sticky, and they are attached to aquatic plants, and the number is between 200 and 300. Fish can be fished out after spawning to prevent them from swallowing fish eggs.

What is the picture below? Big head carp? Pelligrini carp

Distributed in Xingyun Lake and Qilu Lake in China.

What is the picture below? Hami golden thread

Yangzonghai, Dianchi Lake (with its rivers, caves and underground rivers) and Fuxian Lake in Yunnan, China.

What is the picture below? Schizothorax Dali? Schizothorax tali?

Anguilla's eel family? Anguilla Anguilla

What is the picture below? What is the common name of bass eel? European eel, snow eel, king eel, black eel, creek eel?

The extension is cylindrical, but the tail behind the anus is slightly flat. The scales are small, the body is grayish black or yellowish brown but striped, and the abdomen is silvery white; Both dorsal fin and gluteal fin are low and flat, extending to the tail, and connected with caudal fin as a whole, which is difficult to distinguish from each other.

Carnivorous fish inhabiting the bottom of sand and mud, their young fish grow in rivers, and adult fish fall into the sea to lay eggs in late spring and early summer. After hatching, the young fish turn into a transparent eel line after willow period, and it takes 5 months to return to the river to survive. During the day, the whole body is hidden in the mud, only one head is exposed to breathe, and at night, it swims out to feed on other fish, shrimp and crabs.

Salmonidae? Salmonidae? Hucho of the genus Hucho.

What is the picture below? Sichuan-Shaanxi Hucho salmon? Hujo Brickley?

Salmonidae? Salmonidae? Lepidoptera? Brachymystax？ Fish?

The picture below shows the fine-scaled fish? Lepidoptera (Lepidoptera qinlingensis)

Spindle shape, slightly flat. Blunt head, wide head and back, slightly convex center. Kiss is not prominent or slightly prominent. In the oral position, the mandible is slightly shorter than the maxilla, and the posterior end of the maxilla reaches below the center of the eye. There are a row of sharp teeth on the maxilla, the vomer and the palate. The tongue is thick and free. The branchial foramen is large, located on the outside and extending forward below the center of the eye. The body is covered with fine scales and the head is scaleless. The lateral line is complete and relatively straight. The dorsal fin is short and the outer edge is slightly concave; Lipid fin is opposite to gluteal fin; The ventral fin begins below the middle of the dorsal fin base and does not reach the anus, and there are long axillary scales at its base; Tail fin bifurcation. There are 65~75 pyloric caecum. When living, the back is dark brown and gradually turns white from the side to the abdomen. There are oblong black spots scattered on the back and sides of the body, with reddish edges, and 4~5 round black spots along the base of dorsal fin and lipid fin respectively.