LampetrareissneriDybowski

Total length is 15.1~21.8 times of body height, 4.2~5.2 times of head length, and 2.0~2.1 times of length before dorsal fin.
The body is eel-shaped, with slightly flattened tail. The tail is short, and the anus is located at the back of the body. The head is long and cylindrical. The eyes are transparent and not covered by thick membranes. There is one nostril, located in the center of the back of the eyes. The mouth funnel is ventrally located, in the shape of a round sucker, with many horny teeth on the inner side of the sucker, and no outer teeth. There are no upper and lower jaws. There are 7 gill sacs on each side, and each sac has a short external gill tube. There are 7 gill openings on each side, located behind the eyes. The lateral line tube holes on the head are not clearly differentiated. The body is scaleless. There are 2 dorsal fins, in the posterior half of the body, in the shape of two peaks, connected at the base. The anal fin degenerates into a skin fold. The anal fi

In China, it is only distributed in the Wusuli River, Mudan River, Songhua River, Heilongjiang River, Xingkai Lake, Taizi River and other water systems in the northeast region.
Abroad, it is distributed in North Korea, Kyushu, Japan and Russia. Over the years, this species has rarely been found parasitized on fish caught.

The Latin name of Reissner's lamprey is LampetrareissneriDybowski, and its foreign name is ReissnerLamprey. It is a relatively small freshwater species.

The Lamprey's lamprey is a relatively small terrestrial species that is semi-parasitic and prefers to live in freshwater streams with slow currents and sandy bottoms. It hides at the bottom of the water during the day and comes out to forage at night. The development process undergoes metamorphosis, and the larvae enter the metamorphosis period when they are 160mm long. After metamorphosis, the digestive organs atrophy, the intestines are partially filled with tissues, and there is no parasitic nutrition period, and it directly enters the reproductive period. The spawning period is from the end of May to July. After spawning, some parents die, while others can survive. Adults are smaller than larvae. Larvae can reach 18.8 cm in length, up to 23 cm in length, and adults are usually 12-18 cm, sometimes up to 22 cm. Larvae mainly feed on plant debris and attached algae on sand and gravel, while adults feed on plankton and also live a parasitic life. When living a parasitic life, they often use suction cups to suck on other fish, use teeth and teeth on the tongue to file the fish body, and suck its flesh and blood with the piston movement of the tongue.

The Lampreys leucopsis is an ancient jawless vertebrate with important scientific research value. Due to factors such as soil erosion caused by vegetation destruction, river blockage, and water pollution in the distribution area, its resources have declined and the population has tended to decline.

Listed in the "China Red Book of Endangered Animals"; the protection level in the "China Red List of Species" is vulnerable.

Listed in the second level of the "List of National Key Protected Wildlife in China".

Protect wild animals and eliminate game.

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