Eastern Mosquitofish
Gambusia holbrookii — Hardy but highly aggressive livebearing fish notorious for fin-nipping and harassing other fish. Introduced worldwide as mosquito control with disastrous ecological results. Only suitable for species tanks or as outdoor pond fish.
Care at a glance
| Scientific name | Gambusia holbrookii |
|---|---|
| Type | livebearer |
| Adult size | 2.5" |
| Minimum tank | 15 gal |
| Group size | 4+ |
| Temperament | aggressive |
| Temperature | 55-79°F |
| pH | 6.5-8.5 |
| GH | 5-25 |
| Diet | omnivore |
| Swimming zone | top |
| Care level | easy |
| Plant-safe | No |