Western Mosquitofish
Gambusia affinis
Also called mosquitofish, gambusia
A small freshwater fish native to the southeastern United States, widely introduced for mosquito control. Known for its ability to consume large quantities of mosquito larvae.
Western Mosquitofish at a glance
- Scientific name
- Gambusia affinis
- Typical size
- 1-2 inches, less than 0.1 lbs
- Water
- Freshwater
- Habitat
- Freshwater
- Rarity in the Fishdex™
- Common
Habitat
Found in shallow freshwater environments including ponds, ditches, slow-moving streams, and marshes. Not typically targeted by anglers due to its tiny size, but may be caught incidentally or used as bait fish. Prefers vegetated areas near the surface.
Catch one and it is yours
Log a western mosquitofish through the Cobia Camera and this entry fills in with your photo, your personal best, and the exact conditions on the day. The app also carries the slot and season rules for wherever you are standing.
How the Fishdex™ worksWestern Mosquitofish questions people ask
Western Mosquitofish is Gambusia affinis. Anglers also call it mosquitofish, gambusia.
A typical western mosquitofish runs 1-2 inches, less than 0.1 lbs. Cobia records the length and weight of every western mosquitofish you log and keeps your personal best on its Fishdex entry.
Found in shallow freshwater environments including ponds, ditches, slow-moving streams, and marshes. Not typically targeted by anglers due to its tiny size, but may be caught incidentally or used as bait fish. Prefers vegetated areas near the surface. It is a fresh water species, filed under freshwater in the Fishdex.
Yes. Log one through the Cobia Camera and this entry fills in with your own photo, your personal best, and the conditions on the day you caught it. The app also carries the slot limits and season dates for wherever you are standing. It is free.
Tomorrow morning starts tonight
Set your home water, pick a drive radius, and wake up to a plan.
Android coming soon
iPhone, iOS 17 or later. Setup takes about a minute.