Home < Resident Guide < Mosquito Control < Mosquito Fish

Mosquito Fish

Calvert County is committed to using natural controls to reduce reliance on chemicals to manage the mosquito population. We’ve implemented an aggressive fish management program by stocking mosquito fish in artificial impoundments such as ornamental ponds and storm water ponds.

This tiny fish loves to devour mosquito larvae, reducing the numbers of adult mosquitoes. They are native to the Chesapeake Bay, found in tidal areas and streams. They are related to guppies, and like guppies they bear live young. They are a hardy fish able to tolerate over-crowding and poor water quality. Every year we transfer over a thousand fish within the County.

If you reside in Calvert County Maryland and are interested in adding mosquito fish to your ornamental pond or know of a storm water pond near your home, you can contact us at 410-535-6924 or at mosquitocontrol@co.cal.md.us - the fish are provided free of charge.

If you reside outside of our jurisdiction, please contact your local Department of Natural Resources.