In order to protect otters, the last Wednesday of May every year is designated as "World Otter Day", initiated by the International Otter Survival Foundation (IOSF).

Otter is a mammal belonging to the genus Otter of Carnivora, with a slender body and short and round limbs. The head is flat and slightly wide; The whole body hair is short and dense, with silky luster; The back and tail are brownish black or brown, and the abdominal hair is long and light brown. Otter is also called otter cat, fish cat, water dog, water hair and water monkey.

Otters are distributed all over China, Europe, Asia and North Africa. Otter is a semi-aquatic animal, which often lives in rivers, lakes, streams and banks, even in rice fields, and is more common in lakes and places with gentle water flow.

morphological character

Otter, a carnivorous mammal of the genus Otter, is slender, with a body length of about 560-800mm, a tail length of about 300-400mm, an oblate body length, a slightly flat head, a short kiss, slightly prominent and round eyes, small ears, a round outer edge, a low landing position, short and round limbs and a toe.

There are several short bristles in the center of the chin, and there are several short bristles behind the wrist pad of the forelimb. The nose and ear canal have small round flaps, which can be closed when diving to prevent water from invading. The whole body hair is short and dense, with silky luster, the back and tail are brown or black, and the ventral hair is long and light brown.