First, the subject classification is different
1, ACIPENSER sinensis
It belongs to chordata, teleostegia, ACIPENSER, ACIPENSER, ACIPENSER and ACIPENSER sinensis.
2. Scavengers
It belongs to Chordata, Actinidia, Siluriformes, Siluridae, Silurus and Silurus.
Second, the morphological characteristics are different
1, ACIPENSER sinensis
The body is spindle-shaped, the tip of the head is long, and there are four whiskers in front of the mouth. The mouth is located on the ventral side, which is flexible and can be stretched into a tube. The body is covered with five lines of large and hard bone scales, one line on the back and two lines on the body side and the ventral side. The caudal fin is crooked, the lateral fin has a broad base, and the dorsal fin is opposite to the gluteal fin. The ventral fin is located in front of the dorsal fin, with spiny scales at the base of the fin and caudal fin, spiral valves in the intestine, anus and drainage holes near the base of the ventral fin, and the opening of the fallopian tube is far away from the ovary.
2. Scavengers
The fish is streamlined, with small eyes and a lower mouth, with a prominent forehead and a thick kiss. The upper and lower lips have left and right teeth respectively. The teeth are brush-shaped. Mouth position, left and right 1 piece. A comb as dense as a gill rake. The body is covered with black patterns and the black stripes are clear. The base of pectoral fin can make a sound similar to that of Pelteobagrus fulvidraco. There are 2 dorsal fins, no lateral line scales, and only 4 rows of large scales on the body side.
Third, different living habits
1, ACIPENSER sinensis
Acipenser sinensis lives in rivers and offshore waters, and is a bottom fish, which is migratory or semi-migratory. In spring and summer, it likes to gather in the estuary from May to June, and it goes back to the upper reaches of rivers in autumn.
Omnivorous fish, which mainly feed on animal food, mainly feed on some small or slow-moving benthos, including shrimps and crabs, fish, mollusks and aquatic insects. Because of the different food types in the living environment, the young fish mainly feed on chironomid larvae, dragonfly larvae, mayfly larvae and plant debris in the middle and upper reaches of the Yangtze River, while the young fish in the salty and fresh water area of the estuary feed on shrimp, crabs and small fish. Parent fish do not eat during migration. In the offshore waters outside the Yangtze estuary, the feeding intensity of Chinese sturgeon increases, usually at level 3-4. The food is mainly fish and crabs, as well as shrimp and cephalopods.
2. Scavengers
The scavenger, whose scientific name is "King Alien", originated in Latin America, also known as sucker fish, trash fish fish and anglerfish fish. It is big and has a developed mouth and lips like a sucker. It is named after eating all kinds of underwater garbage and is often mixed with all kinds of fish. Adult scavengers have a huge appetite. In addition to algae such as moss, they also feed on the eggs of other fish. They can eat 3,000 to 5,000 eggs a day and swallow fry. In the aquarium, it is often adsorbed on stones and glass to stabilize the body and suck algae and moss.
Baidu encyclopedia-ACIPENSER sinensis
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