Scientific name: Enhydris chinensis

Because of habitat destruction, it is rare now; Habitat in ponds, paddy fields or drainage ditches. More than dusk and night activities, mainly fish and amphibians. Viviparous, the female snake begins to have embryos in the abdomen in May and June, and gives birth to young snakes in August and September, with 3-2 1 snake per litter. It has posterior sulcus teeth and is non-toxic to people.

Silver water snake, 350～474 mm in length. Olive color on the back, with lead luster; The ventral surface is white, the outer sides and base of the ventral scales are gray-black, and the center is scattered with fine black spots. The trunk is cylindrical and the tail is short. The nasal scales are single, the left and right nasal scales are tangent, and the nostrils are in the back position; The eye is vesicular, hence the name "blister snake", with preorbital scale 1(2) and retroorbital scale 2 (1); Temporal scales1+2; Scales of upper lip 8,3-2-3. The back scale is smooth, 19- 19- 17 lines; Abdominal scales123-136; The anal scale is divided into two parts, and the caudal scale is 3 1-43 pairs.

China is distributed in Jiangsu, Zhejiang, Jiangxi, Fujian, Taiwan Province, Guangdong, Guangxi, Hainan, Hong Kong and Yunnan.

Foreign countries are distributed in Southeast Asia. Myanmar, Thailand, Vietnam, Malay Peninsula, Indonesia (Sumatra, Java, Borneo, Sulawesi)

Habitat in rice fields, ponds, ditches and their vicinity. Activities are seen during the day and at night, preying on fish, frogs and so on. Viviparous, 2- 12 snakes were born in August, and the newborn snakes were127 ~139 mm long and weighed 2.4 ~ 2.5 g.