Storsjön is an inland lake in central Jämtland. It is part of the Indalsälven water system and is Sweden's fifth largest lake by surface area.
The calcareous soil also gives the lake a natural defense against acidification. The lake branches into several elongated and wide bays such as Myrviken, Bergsviken, Brunfloviken and so on. Storsjön also has many different straits such as Östersundet, Vallsundet, Sannsundet and Rödösundet.
The Storsjö area and Storsjön are sometimes described as an oasis in the wilderness, surrounded by high mountains to the west and large forest areas to the east. The mythical Storsjö Monster is believed to be found in the lake. Storsjön is a species- and fish-rich lake. There are nearly 20 different species of fish in the lake, the most common of which are trout (called Storsjööring, Jämtland's national fish), char, pike, perch, grayling, whitefish (five different species), roach and roach. Minnows, eels and common bream are also found in Storsjön. Some fish species are now also present in the lake as a result of human activity. The eel became established in the lake in the early 1970s after being introduced higher up the Indalsälven River as a fish food animal in regulated mountain lakes. Since then, the fish fauna in Storsjön has gradually been expanded with Canadian trout (from 1962) and smelt. There is speculation about introduced catfish, based on an old legend, but there is no support for these speculations. (Source: Wikipedia)
