The Redline Snakehead is a large freshwater fish introduced to Sri Lanka and is not native to the island. Originally distributed throughout Southeast Asia, it has been reported from some reservoirs, lakes, and other freshwater habitats in Sri Lanka, most likely as a result of deliberate releases or escapes from the aquarium trade.

This species is one of the largest snakeheads in the world and is a powerful predator. Juveniles are easily recognized by the bright red or orange stripe running along the body, while adults become darker in colour as they mature. Like other snakeheads, it possesses a specialized air-breathing organ that allows it to survive in waters with low dissolved oxygen.

The Redline Snakehead is an aggressive carnivore, feeding on fish, frogs, crustaceans, and other aquatic animals. Its rapid growth, large size, and voracious appetite make it a dominant predator wherever it becomes established.

As an introduced species, the Redline Snakehead poses a potential threat to Sri Lanka’s native freshwater biodiversity. In areas where it has become established, it may prey on native fish populations and compete with indigenous predatory species for food and habitat. Preventing further releases and monitoring existing populations are important to minimize its impact on Sri Lanka’s freshwater ecosystems.