Gymnocephalus cernuus


Habitat: Freshwater ecosystems


Description: This is a small species of fish generally reaching only up to 20 cm in length. It is brownish in colour with dark spots over its body. Ruffe have large spiny dorsal fin which is fused


Origin and Distribution: Native to Europe and Asia. This species has become invasive in parts of continental Europe, Britain and also the Great Lakes in North America


Impacts: The rapid growth and reproduction rate of this species impacts on fish communities as food and resources for native and desirable fish species become reduced. Fish eggs are also a target food source for this species


How might it get here? Introductions of this species are generally accidental or unintentional. This species can be introduced as live bait or in ballast water


Prevent Spread:

Invasive Species Ireland

Invasive Species Ireland