These are “Mosquito Fish” of the genus Gambusia, native to the Southern United States.
These tiny fish can daily eat their own weight in mosquito larvae, or pupae, and have been introduced throughout the world to aid in control of mosquitoes, especially where malaria and yellow fever are a threat.
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No guarantee is offered as to the accuracy of the images or descriptions contained here. Use this website at your own risk.
Some of the images on this website are in the public domain.