Because the water temperature is low, it is not suitable for fish to survive. The only fish, rainbow trout, can only live in the warm water area near Shantianchi Hot Spring. Rainbow trout is not a native wild fish in Tianchi, but a Korean fish.
North Korea raises rainbow trout fry every year, and some fry enter Tianchi Lake in Changbai Mountain. Rainbow trout grows very slowly in Tianchi Lake, the largest of which does not exceed 500 grams.
Rainbow trout (Oncorhynchus Mykiss, Walbaum, 1792) is a cold-water pond fish of Pacific salmon. Rainbow trout is an important cold-water fish widely cultivated in the world. Mature individuals is named for its reddish brown vertical stripes on its lateral lines, which look like a rainbow. Native to northern North America and the west coast of the Pacific Ocean, it mainly lives in low-temperature fresh water, which requires high water quality in aquaculture waters. Rainbow trout is an edible fish, which has been transplanted to many countries, but has become an invasive species in some areas.
The Changbai Mountain Pool in the sky is a dormant volcano, and the water in the crater has become a lake. In summer, the water in the melting pool is bluer than the sky. The frozen ice in winter is as white as snow, surrounded by 16 peak. Only between Tianhuo Peak and Longmen Peak, a narrow pool overflows and falls into Changbai Waterfall, which is the source of Songhua River.
Tianchi Lake in Changbai Mountain is located at the top of the volcanic cone of the main peak of Changbai Mountain. It is a crater, and after a long period of water, it has become a volcanic lake. Due to the influence of environment and topography, Changbai Mountain is rich in precipitation, and the precipitation center is around Tianchi Lake. Coupled with the volcanic terrain conditions, many rivers, waterfalls, springs, waters and lakes with their own characteristics have developed on the volcanic cone and lava plateau in Changbai Mountain.
References:
Baidu Encyclopedia-Rainbow Trout Baidu Encyclopedia-Changbai Mountain Tianchi