Overview
The Mosquitofish (Gambusia affinis) is a beginner freshwater species known for its silver-gray coloration. Used for mosquito control. Surface.
Origin & Appearance
Origin: North America.
Colors: Silver-Gray.
Body Shape: Fusiform (torpedo/streamlined). Typical adult dimensions: 7.0 x 1.3 x 2.1.
Sexual Dimorphism: Strong; females much larger, males have gonopodium.
Tank & Water Requirements
| Min Tank Size | 11 gallons |
| Temperature | 64–84°F |
| pH Range | 6–8 |
| Water Hardness (GH) | 8-20 |
| Bioload | low |
| Oxygen Demand | low |
| Plant Safe | yes |
| Aquarium Position | Surface |
Behavior & Activity
Surface skimmer; quick erratic darting at the top; snaps at surface insects; aggressive chasing behavior
Speed: 45/100Aggression: 4/10diurnalSchooling (6+)
Breeding
Easy; livebearer; prolific
Common Diseases
💊 Hardy💊 few diseases
Expert Notes
Used for mosquito control