Step 1: Understanding the Concept:
Several states in India have declared state symbols, including state fishes, to protect ecologically and culturally valuable species.
Step 2: Detailed Explanation:
The state fish of Manipur is the "Pengba", scientifically named {Osteobrama belangeri.
This fish has immense cultural and economic value in Manipur, and dedicated conservation and breeding programs have been launched to restore its declining wild populations.
Step 3: Final Answer:
The state fish of Manipur is Osteobrama belangeri, which corresponds to option (C).