Fundulus sp. is an example of

Fundulus sp. is an example of Mosquitocidal fish.
Fundulus is a genus of ray-finned fishes in the superfamily Funduloidea, family Fundulidae. It belongs to the order toothcarps, and therein the large suborder Cyprinodontoidei.
Fundulus have evolved to occupy a wide range of aquatic ecosystems, including marine, estuarine, and freshwater, making it a good comparative model system for studying evolutionary divergence between marine and freshwater environments.