What do you know about mosquitoes?

Mosquito-eating fish, also known as mosquito fish, juveniles, are small fish that hunt mosquitoes and mosquito larvae. They are juvenile fish, with a very small size, only about 4cm.

This fish is native to Central America, but due to its very effective mosquito larvae, it has been introduced to many different regions of the world. This fish is very beneficial in controlling mosquito-borne diseases.


Mosquito-eating fish are small, slender, like willow leaves. Light yellow body greenish color, abdomen bulging. Adults are up to 8cm long, but most are about 5cm long.

The teeth are very small, the mouth is slightly pointed, and the eyes are large, the breed of fish that spawns. Dorsal and abdominal fins are located near the base of the caudal. Males have long, rounded female genitalia.

Suitable mosquito fish live at water temperature 18-28 ° C. Their main food is invertebrates, plankton, and especially mosquitoes. This fish has the ability to make the sound of a fish bubble. Personality is relatively aggressive, often attacking similarly sized fish.

During the day they often dive to the bottom, and at night they begin to come up for prey. In April-May every year, the fish begin to migrate to nearshore areas to prepare for spawning. Mosquito fish have no stomach, short and primitive digestive organs. Hence they can eat large quantities of larvae compared to their body size.

When the temperature is stable, one fish a day can eat 40-100 larvae. Up to 200, they are famously the natural enemies of mosquitoes. The name “Mosquito Fish” was given to them due to the special diet of this fish.

How do fish eat mosquitoes?

Mosquito fish breed, each spawn in large numbers and the reproductive cycle is very short. The fry after being born only about 1 month has reached adulthood, starting to reproduce the next generation. The breeding season of mosquitoes is from April to October every year, mainly from May to September. Each fish litter 30-40 days apart, each fish spawns 30-50 fry.

During the cold season, the water temperature drops, mosquitoes often seek shelter or hide in the mud. Even without oxygen they can survive. When spring comes, mosquito larvae and plankton thrive again when the fish leaves the cave. At this time, a plentiful amount of food is sufficient to prepare them for the breeding season.

Mosquito fish are very adaptable and easy to keep. They are often used as live bait in livestock or as bait. They are easy to find and inexpensive.

In addition to mosquito-eating fish, a number of other small ornamental fish species are now also raised to prevent larvae. Typically Betta fish, guppies, Siamese fighting fish, …

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