Platybelone argalus, commonly known as the flat needlefish, inhabits warm coastal waters, often near coral reefs. Notable for its elongated, slender body and a beak-like snout filled with sharp teeth, it is a skilled predator. Its silvery, reflective scales help it blend into shimmering oceanic surroundings.

Platybelone argalus, commonly known as the Redtail Needlefish, is native to the tropical and subtropical regions of the Atlantic Ocean, including the Gulf of Mexico, the Caribbean Sea, and the western Atlantic Ocean from the coast of Florida down to Brazil.

The Redtail Needlefish typically inhabits coastal marine environments, often found in open waters near the surface. They are frequently observed in areas with clear, warm waters, usually in the temperature range of 20-30°C (68-86°F). These fish are adapted to live in both offshore and nearshore environments, sometimes venturing into estuarine and brackish waters.

Platybelone argalus occupies the ecological niche of a surface-dwelling predator. They primarily feed on small fish and invertebrates, using their elongated bodies and pointed snouts to capture prey efficiently. Their presence in the food chain helps regulate populations of smaller marine organisms, contributing to the ecological balance in their native habitats.