Three invasive species are now banned from import and interstate trade in the US

The US Fish and Wildlife Service proposes to ban the import and interstate shipment of two types of freshwater mussels and one crayfish species. This means these animals, their larvae, or eggs cannot enter the US or be moved between states and territories without special permission.

The US has a long history of invasive species causing billions in damage to ecosystems and infrastructure. This rule aims to stop new invasions before they start, rather than trying to control them after they are established. It shifts the burden of proof: instead of waiting for damage, these species are now presumed harmful.