The Zeta River is 86 km long. At the mouth, it has more water than the Morača River, but the Morača River is longer and has a straight flow. The waters of the Zeta River are exploited by three hydropower plants. Zeta is a real water and fishing gem, with indigenous trout and other fish species. When it becomes a nature park, a fishing moratorium is planned to be introduced.
The valley of the River Zeta and the river itself is an important ecosystem for Montenegro.
Out of 352 registered bird species in Montenegro, 20 percent of the total number are birds with preserved habitat, and all these species are present in this area.