Question

Fish which eradicates the mosquito larvae is

• A. Anabus
• B. Rohu
• C. Gambusia
• D. Cuttlefish

Answer 1

The correct option is C

Gambusia

The correct option is C.

Explanation of correct option

1. Gambusia affinis is a freshwater fish species that is also known as mosquitofish.
2. Mosquitofish were administered into ecosystems as a biocontrol to reduce mosquito populations in various places of the world but this had a negative impact on several other organisms like zooplankton and other insects.
3. Mosquitofish are classed as larvivorous fish based on their feed.
4. They consume mosquito larvae at all phases of their development.
5. In a single day, adult females can feed a large number of mosquito larvae.

Explanation of incorrect options

Option A:

1. Anabas also known as the Climbing perch and Walking Fish is a small freshwater fish that can survive in and move outside of water.
2. It is an air-breathing labyrinth fish.

Option B:

1. Rohu (Labeo rohita) can be found in freshwater rivers, streams, ponds, and lakes.
2. It is mainly herbivorous and a bottom feeder, eating algae and aquatic plants.

Option D:

1. Cuttlefish are saltwater mollusks with a distinctive internal shell called the cuttlebone that helps them maintain their buoyancy.
2. Small fishes, mollusks, crabs, worms, and shrimps are among the foods consumed by cuttlefish.

Final Answer: The fish which eradicates the mosquito larvae is Gambusia.