Recognizing the importance of conserving riverine fauna including the Gharial, the Government of Madhya Pradesh declared the area comprising the Son River and its main two tributaries as the Son Gharial Wildlife Sanctuary by an order dated 23 September 1981. The then Chief Minister of Madhya Pradesh,
Arjun Singh, officially inaugurated the sanctuary on 11 October 1981 by releasing a pair of Muggar and a pair of Gharial into the Sone River. ==Flora and fauna==