




gambusia holbrooki
The Eastern Mosquitofish is a small, lively fish that's great for controlling mosquito populations! They zip around in the water, making them fun to watch as they play and explore their home.
Habitat: Ponds, streams, and marshes across the eastern United States.
The Eastern Mosquitofish is a small, slender fish with a flattened head and an upward-pointing mouth. It has a dull greyish-olive back fading to a silvery-white belly, often with a dark 'gravid spot' visible on females. Its small size and distinct male anal fin (gonopodium) differentiate it.





Category
FishRarity
Common
Danger
0/5 · No known danger
Snaps
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Female mosquitofish can store sperm for months, making many batches of babies!
Introduced worldwide to fight mosquitoes, they are now one of the most widespread fish!
These tiny fish can gulp air from the surface when water oxygen is low!
They are super tiny but can be aggressive, nipping the fins of larger fish!
Eastern Mosquitofish can devour large numbers of mosquito larvae, which helps them control insect populations in their watery homes.
Eastern Mosquitofish has the amazing ability to give birth to live, fully formed young, skipping the egg stage for survival.
Eastern Mosquitofish can endure harsh conditions like low oxygen because of its adaptable gill and kidney systems.
These tiny fish are expert insect hunters, gobbling up mosquito larvae and other small critters.
Aedes aegypti
eats their larvae, helping control mosquito populations

Micropterus salmoides
a common food source for this larger predatory fish
Anas platyrhynchos
small size makes them prey for waterfowl
Social animals live in organized groups, cooperating for survival benefits such as foraging, defense, and raising offspring.
Colorful describes organisms or objects displaying a wide range of bright and distinct colors.
This trait identifies organisms whose diet consists entirely or primarily of animal tissue.
Diurnal animals are primarily active during daylight hours, typically resting or sleeping at night.
Aquatic habitats encompass environments where organisms live predominantly in water, including oceans, rivers, lakes, and wetlands.
Danger
0/5 · No known danger
No special safety notes yet.
2-6 cm
0.001-0.005 kg
1-2 years
These tiny fish are expert insect hunters, gobbling up mosquito larvae and other small critters.
8 km/h
Ponds, streams, and marshes across the eastern United States.
Foraging
2 m
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District of Columbia, US
You might spot Blue Dasher, Fragile Forktail, and Slaty Skimmer.
View guide →

Virginia, US
You might spot Eastern Blacknose Dace and Common Jewelweed.
View guide →

Florida, US
You might spot Oaks, Baldcypresses, and Virginia Creeper.
View guide →