Poecilia, commonly known as mollies or guppies, are small, colorful freshwater fish native to the Americas. They thrive in warm, slow-moving waters and are known for their vibrant hues and live-bearing reproductive strategy. Poecilia exhibit remarkable adaptability, often found in a range of environments from rivers to brackish waters.

Poecilia, commonly known as mollies and guppies, are native to Central and South America. They are primarily found in the fresh and brackish waters of northeastern South America, including countries like Venezuela, Guyana, and as far south as Brazil. Some species of Poecilia are also native to the Gulf of Mexico, including parts of the southern United States such as Florida and Texas.

Poecilia species typically inhabit warm, slow-moving bodies of water such as rivers, streams, wetlands, and estuaries. They thrive in environments with temperatures ranging from 22°C to 28°C (72°F to 82°F) and prefer water with a slightly alkaline pH, ranging from 7.5 to 8.5. These species are adaptable to varying salinities, which allows them to inhabit both freshwater and brackish environments.

Poecilia species occupy a niche as both prey and predator in their ecosystems. They feed on a variety of food sources, including algae, small invertebrates, and detritus, playing a crucial role in controlling algae growth and providing food for larger predators. They exhibit a high degree of adaptability, allowing them to thrive in diverse habitats and making them resilient to environmental changes. Some species have even adapted to live in artificial water bodies like canals and drainage ditches.