Pros and Cons of Having Mosquito Fish In Your Pond

Mosquito fish inhabit ponds and are grayish brown in color. The females are the larger of the species and can grow to around 3 inches. They can be beneficial to a pond’s ecosystem, but can also cause harm. Here are some of the pros and cons to help you decide whether you should keep them.


Mosquito fish will happily consume mosquito larvae (hence the name). They will also eat tubifex and bloodworms. They can eat 100 to 200 mosquito larvae a day. Mosquito fish are incredibly hardy creatures. They can survive water where the temperature ranges between 33 and 98 degree F. They are livebearers and a female if left with males will produce between 10 and 100 offspring every 24 days. They are given away free by many local government agencies in order to control the local mosquito population. 


If mosquito fish are kept with other breeds of fish and insects they will often consume the larvae of those in the same habitat rather than eating mosquito larvae. This can have a damaging effect on the population of other species kept in the pond. They can also take over in a small pond if their population is not controlled because they breed so quickly.