From last year, the Agartala Municipal Corporation has been releasing mosquitofish (Gambusia affinis) in select municipal sewers and urban water bodies to help combat mosquito-borne diseases. These fish feed on mosquito larva and is serving as great alternative to anti-larva sprays which is what is mostly used across the entire country to prevent mosquito infestations.
An initiative under the National Health Mission, the fish help to eliminate mosquito breeding, especially in stagnant waters and sewers. The whole idea behind this initiative is to reduce the number of malaria, dengue and chikungunya cases in the State.
The idea to use mosquitofish to control infestation of mosquitoes and flies has been implemented in many western countries. There are many countries around the world who distribute this species of fish in order to control vector-borne diseases.
Source: Debraj Deb (The Telegraph)