环斑海豹为海豹科海豹属动物,又称环海豹、圈海豹,是海豹类中体形最小的一种,成体背部深灰,具有灰白色环斑,腹面一般呈银白色,无深色斑。环斑海豹分布于整个北冰洋、鄂霍次克海、白令海等寒带水域,在我国见于东海海域,该物种的模式产地在格陵兰。环斑海豹属于我国二级重点保护动物,在国内大部分地区仅在动物园中出现。因此,目前在国内对环斑海豹的研究报道较少,环斑海豹的部分器官在结构上与陆生哺乳动物有较明显的区别。笔者通过对 Ringed seals for the seal family is a marine animal seals, also known as the ring seals, seals, seals is the smallest form of a body, adult back dark gray, with gray ring girdle, ventral generally silver white, no dark spots. Ringed seals are found throughout the Arctic Ocean, the Sea of ​​Okhotsk, the Bering Sea and other boreal waters, which are found in the East China Sea in China. The species is produced in Greenland. Ringed seal belongs to China’s two major protected animals, most of the country only appeared in the zoo. Therefore, at present, there are few reports on Ringed seals in China, and some organs of Ringed seals seal have obvious structural differences from that of terrestrial mammals. The author passed