Widely distributed in the fresh water area of the western Pacific between Hokkaido, Japan and the Philippines, including islands and the Asian continent, as well as other rivers and streams flowing into the Pacific Ocean.
Snow eels can also live in seawater:
Eel is a kind of warm temperate migratory fish that descends into the river. Its growth and fattening period is 5-8 years, and its sex is mature. In late autumn and early winter, parent fish move from fresh water area to estuary, and then flow out of the sea to lay eggs in the river. After entering the sea, the gonads develop rapidly to maturity. The spawning ground is located in the deep water area south of Taiwan Province Province, China. Hatched eels drift with the current, changing from eels to flat eels in the drifting process, and becoming linear eels before entering the estuary.
Reference to the above content: Baidu Encyclopedia-Eel