Invasive fish can spread into lakes

The round goby is an invasive fish species that has quickly established itself in the Baltic. New research now shows that the species can spread into inland lakes and compete with native fish species.

“Our results show that there is a big risk that round gobies from the Baltic will spread into our lakes here in Sweden. Steps should therefore be taken to prevent their spread in water courses that flow into the Baltic or where shipping from the Baltic enters Swedish lakes such as Lake Mälaren,” says researcher Leon Green.