Is Chilika a freshwater lake?

Chilika lake is not a freshwater lake but a brackish water lake. 

Brackish water, also sometimes termed brack water, is water occurring in a natural environment having more salinity than freshwater, but not as much as seawater.

For more relevant articles refer to the links given below:

• UPSC Environment and Ecology Questions
• Major River Systems in India
• UPSC Environment and Ecology