To keep the mosquito population in check and safeguard the health of citizens, members of a housing society at Pratiksha Nagar in Sion and residents of a chawl in Versova, Andheri, have been releasing feeder guppies, a species of tropical fish that devour mosquito larvae, in stormwater drains all year round. 

Guppies, which consume mosquito larvae, in stagnant water on the building’s premises